diff --git a/app/models/form/lettings/questions/ppcodenk.rb b/app/models/form/lettings/questions/ppcodenk.rb
index 25557a166..c8dbd24d0 100644
--- a/app/models/form/lettings/questions/ppcodenk.rb
+++ b/app/models/form/lettings/questions/ppcodenk.rb
@@ -8,11 +8,14 @@ class Form::Lettings::Questions::Ppcodenk < ::Form::Question
     @check_answers_card_number = 0
     @hint_text = "This is also known as the household’s ‘last settled home’."
     @answer_options = ANSWER_OPTIONS
-    @conditional_for = { "ppostcode_full" => [1] }
+    @conditional_for = { "ppostcode_full" => [0] }
     @hidden_in_check_answers = { "depends_on" => [{ "ppcodenk" => 0 }, { "ppcodenk" => 1 }] }
     @question_number = 80
     @disable_clearing_if_not_routed_or_dynamic_answer_options = true
   end
 
-  ANSWER_OPTIONS = { "1" => { "value" => "Yes" }, "0" => { "value" => "No" } }.freeze
+  ANSWER_OPTIONS = {
+    "0" => { "value" => "Yes" },
+    "1" => { "value" => "No" },
+  }.freeze
 end
diff --git a/app/models/form/lettings/questions/ppostcode_full.rb b/app/models/form/lettings/questions/ppostcode_full.rb
index 86b4c7b31..edcbaf30a 100644
--- a/app/models/form/lettings/questions/ppostcode_full.rb
+++ b/app/models/form/lettings/questions/ppostcode_full.rb
@@ -6,7 +6,12 @@ class Form::Lettings::Questions::PpostcodeFull < ::Form::Question
     @header = "Postcode for the previous accommodation"
     @type = "text"
     @width = 5
-    @inferred_check_answers_value = [{ "condition" => { "ppcodenk" => 0 }, "value" => "Not known" }]
+    @inferred_check_answers_value = [{
+      "condition" => {
+        "ppcodenk" => 1,
+      },
+      "value" => "Not known",
+    }]
     @check_answers_card_number = 0
     @hint_text = ""
     @inferred_answers = { "prevloc" => { "is_previous_la_inferred" => true } }
diff --git a/app/models/form/question.rb b/app/models/form/question.rb
index c27dca9c2..9f0a8aac9 100644
--- a/app/models/form/question.rb
+++ b/app/models/form/question.rb
@@ -116,20 +116,20 @@ class Form::Question
     if is_derived_or_has_inferred_check_answers_value?(log)
       "Change"
     elsif type == "checkbox"
-      answer_options.keys.any? { |key| value_is_yes?(log[key], log.lettings?) } ? "Change" : "Answer"
+      answer_options.keys.any? { |key| value_is_yes?(log[key]) } ? "Change" : "Answer"
     else
       log[id].blank? ? "Answer" : "Change"
     end
   end
 
   def unanswered?(log)
-    return answer_options.keys.none? { |key| value_is_yes?(log[key], log.lettings?) } if type == "checkbox"
+    return answer_options.keys.none? { |key| value_is_yes?(log[key]) } if type == "checkbox"
 
     log[id].blank?
   end
 
   def completed?(log)
-    return answer_options.keys.any? { |key| value_is_yes?(log[key], log.lettings?) } if type == "checkbox"
+    return answer_options.keys.any? { |key| value_is_yes?(log[key]) } if type == "checkbox"
 
     log[id].present? || !log.respond_to?(id.to_sym) || has_inferred_display_value?(log)
   end
@@ -166,18 +166,18 @@ class Form::Question
     label || value.to_s
   end
 
-  def value_is_yes?(value, is_lettings)
+  def value_is_yes?(value)
     case type
     when "checkbox"
       value == 1
     when "radio"
-      is_lettings ? RADIO_YES_VALUE_LETTINGS[id.to_sym]&.include?(value) : RADIO_YES_VALUE_SALES[id.to_sym]&.include?(value)
+      RADIO_YES_VALUE[id.to_sym]&.include?(value)
     else
       %w[yes].include?(value.downcase)
     end
   end
 
-  def value_is_no?(value, is_lettings)
+  def value_is_no?(value)
     case type
     when "checkbox"
       value && value.zero?
@@ -272,9 +272,9 @@ private
 
   def checkbox_answer_label(log)
     answer = []
-    return "Yes" if id == "declaration" && value_is_yes?(log["declaration"], log.lettings?)
+    return "Yes" if id == "declaration" && value_is_yes?(log["declaration"])
 
-    answer_options.each { |key, options| value_is_yes?(log[key], log.lettings?) ? answer << options["value"] : nil }
+    answer_options.each { |key, options| value_is_yes?(log[key]) ? answer << options["value"] : nil }
     answer.join(", ")
   end
 
@@ -338,6 +338,7 @@ private
     is_carehome: [1],
     hbrentshortfall: [1],
     net_income_value_check: [0],
+    ppcodenk: [0],
   }.freeze
 
   RADIO_NO_VALUE = {
@@ -362,13 +363,9 @@ private
     is_carehome: [0],
     hbrentshortfall: [2],
     net_income_value_check: [1],
+    ppcodenk: [1],
   }.freeze
 
-  RADIO_YES_VALUE_LETTINGS = RADIO_YES_VALUE.merge({ ppcodenk: [1] })
-  RADIO_YES_VALUE_SALES = RADIO_YES_VALUE.merge({ ppcodenk: [0] })
-  RADIO_NO_VALUE_LETTINGS = RADIO_NO_VALUE.merge({ ppcodenk: [0] })
-  RADIO_NO_VALUE_SALES = RADIO_NO_VALUE.merge({ ppcodenk: [1] })
-
   RADIO_DONT_KNOW_VALUE = {
     sheltered: [3],
     underoccupation_benefitcap: [3],
diff --git a/app/models/lettings_log.rb b/app/models/lettings_log.rb
index 9ab6329d2..6d15699cc 100644
--- a/app/models/lettings_log.rb
+++ b/app/models/lettings_log.rb
@@ -260,8 +260,8 @@ class LettingsLog < Log
   end
 
   def previous_postcode_known?
-    # 1: Yes
-    ppcodenk == 1
+    # 0: Yes
+    ppcodenk&.zero?
   end
 
   def previous_la_known?
@@ -628,16 +628,22 @@ private
 
   def process_postcode_changes!
     self.postcode_full = upcase_and_remove_whitespace(postcode_full)
-    process_postcode(postcode_full, "postcode_known", "is_la_inferred", "la")
+    return if postcode_full.blank?
+
+    self.postcode_known = 1
+    inferred_la = get_inferred_la(postcode_full)
+    self.is_la_inferred = inferred_la.present?
+    self.la = inferred_la if inferred_la.present?
   end
 
-  def process_postcode(postcode, postcode_known_key, la_inferred_key, la_key)
-    return if postcode.blank?
+  def process_previous_postcode_changes!
+    self.ppostcode_full = upcase_and_remove_whitespace(ppostcode_full)
+    return if ppostcode_full.blank?
 
-    self[postcode_known_key] = 1
-    inferred_la = get_inferred_la(postcode)
-    self[la_inferred_key] = inferred_la.present?
-    self[la_key] = inferred_la if inferred_la.present?
+    self.ppcodenk = 0
+    inferred_la = get_inferred_la(ppostcode_full)
+    self.is_previous_la_inferred = inferred_la.present?
+    self.prevloc = inferred_la if inferred_la.present?
   end
 
   def get_has_benefits
diff --git a/app/models/log.rb b/app/models/log.rb
index 024470b21..849927cf1 100644
--- a/app/models/log.rb
+++ b/app/models/log.rb
@@ -232,11 +232,6 @@ private
 
   PIO = PostcodeService.new
 
-  def process_previous_postcode_changes!
-    self.ppostcode_full = upcase_and_remove_whitespace(ppostcode_full)
-    process_postcode(ppostcode_full, "ppcodenk", "is_previous_la_inferred", "prevloc")
-  end
-
   LA_CHANGES = {
     "E07000027" => "E06000064", # Barrow-in-Furness => Westmorland and Furness
     "E07000030" => "E06000064", # Eden => Westmorland and Furness
diff --git a/app/models/sales_log.rb b/app/models/sales_log.rb
index 283485d11..f144336bf 100644
--- a/app/models/sales_log.rb
+++ b/app/models/sales_log.rb
@@ -278,15 +278,6 @@ class SalesLog < Log
     mortgage + deposit
   end
 
-  def process_postcode(postcode, postcode_known_key, la_inferred_key, la_key)
-    return if postcode.blank?
-
-    self[postcode_known_key] = 0
-    inferred_la = get_inferred_la(postcode)
-    self[la_inferred_key] = inferred_la.present?
-    self[la_key] = inferred_la if inferred_la.present?
-  end
-
   def outright_sale?
     ownershipsch == 3
   end
@@ -305,7 +296,22 @@ class SalesLog < Log
 
   def process_postcode_changes!
     self.postcode_full = upcase_and_remove_whitespace(postcode_full)
-    process_postcode(postcode_full, "pcodenk", "is_la_inferred", "la")
+    return if postcode_full.blank?
+
+    self.pcodenk = 0
+    inferred_la = get_inferred_la(postcode_full)
+    self.is_la_inferred = inferred_la.present?
+    self.la = inferred_la if inferred_la.present?
+  end
+
+  def process_previous_postcode_changes!
+    self.ppostcode_full = upcase_and_remove_whitespace(ppostcode_full)
+    return if ppostcode_full.blank?
+
+    self.ppcodenk = 0
+    inferred_la = get_inferred_la(ppostcode_full)
+    self.is_previous_la_inferred = inferred_la.present?
+    self.prevloc = inferred_la if inferred_la.present?
   end
 
   def reset_created_by!
diff --git a/app/services/bulk_upload/lettings/year2022/row_parser.rb b/app/services/bulk_upload/lettings/year2022/row_parser.rb
index 9bef9312f..a5c598d5a 100644
--- a/app/services/bulk_upload/lettings/year2022/row_parser.rb
+++ b/app/services/bulk_upload/lettings/year2022/row_parser.rb
@@ -1285,9 +1285,9 @@ private
   def ppcodenk
     case field_65
     when 1
-      1
-    when 2
       0
+    when 2
+      1
     end
   end
 
diff --git a/app/services/bulk_upload/lettings/year2023/row_parser.rb b/app/services/bulk_upload/lettings/year2023/row_parser.rb
index 8d023792c..4abfdac17 100644
--- a/app/services/bulk_upload/lettings/year2023/row_parser.rb
+++ b/app/services/bulk_upload/lettings/year2023/row_parser.rb
@@ -1424,9 +1424,9 @@ private
   def ppcodenk
     case field_106
     when 1
-      1
-    when 2
       0
+    when 2
+      1
     end
   end
 
diff --git a/app/services/imports/lettings_logs_import_service.rb b/app/services/imports/lettings_logs_import_service.rb
index 339dc5ca9..a1c957b85 100644
--- a/app/services/imports/lettings_logs_import_service.rb
+++ b/app/services/imports/lettings_logs_import_service.rb
@@ -465,11 +465,11 @@ module Imports
     def previous_postcode_known(xml_doc, previous_postcode, prevloc)
       previous_postcode_known = string_or_nil(xml_doc, "Q12bnot")
       if previous_postcode_known == "Temporary_or_Unknown" || (previous_postcode.nil? && prevloc.present?)
-        0 # not known
+        1 # not known
       elsif previous_postcode.nil?
         nil
       else
-        1 # known
+        0 # known
       end
     end
 
diff --git a/config/forms/2021_2022.json b/config/forms/2021_2022.json
index 75660731d..086f201c2 100644
--- a/config/forms/2021_2022.json
+++ b/config/forms/2021_2022.json
@@ -6488,15 +6488,15 @@
                   "disable_clearing_if_not_routed_or_dynamic_answer_options": true,
                   "answer_options": {
                     "1": {
-                      "value": "Yes"
+                      "value": "No"
                     },
                     "0": {
-                      "value": "No"
+                      "value": "Yes"
                     }
                   },
                   "conditional_for": {
                     "ppostcode_full": [
-                      1
+                      0
                     ]
                   },
                   "hidden_in_check_answers": {
@@ -6524,7 +6524,7 @@
                   },
                   "inferred_check_answers_value": [{
                     "condition": {
-                      "ppcodenk": 0
+                      "ppcodenk": 1
                     },
                     "value": "Not known"
                   }]
diff --git a/config/forms/2022_2023.json b/config/forms/2022_2023.json
index 8d5f674f3..f8eb4d4c5 100644
--- a/config/forms/2022_2023.json
+++ b/config/forms/2022_2023.json
@@ -6388,16 +6388,16 @@
                   "type": "radio",
                   "disable_clearing_if_not_routed_or_dynamic_answer_options": true,
                   "answer_options": {
-                    "1": {
+                    "0": {
                       "value": "Yes"
                     },
-                    "0": {
+                    "1": {
                       "value": "No"
                     }
                   },
                   "conditional_for": {
                     "ppostcode_full": [
-                      1
+                      0
                     ]
                   },
                   "hidden_in_check_answers": {
@@ -6425,7 +6425,7 @@
                   },
                   "inferred_check_answers_value": [{
                     "condition": {
-                      "ppcodenk": 0
+                      "ppcodenk": 1
                     },
                     "value": "Not known"
                   }]
diff --git a/lib/tasks/correct_ppcodenk_values.rake b/lib/tasks/correct_ppcodenk_values.rake
new file mode 100644
index 000000000..86c678fc0
--- /dev/null
+++ b/lib/tasks/correct_ppcodenk_values.rake
@@ -0,0 +1,6 @@
+desc "Alter ppcodenk values for non imported lettings logs in the database"
+task correct_ppcodenk_values: :environment do
+  LettingsLog.where.not(ppcodenk: nil).find_each do |log|
+    log.update_columns(ppcodenk: log.ppcodenk == 1 ? 0 : 1)
+  end
+end
diff --git a/spec/factories/lettings_log.rb b/spec/factories/lettings_log.rb
index 59eb48da2..6cce1dfea 100644
--- a/spec/factories/lettings_log.rb
+++ b/spec/factories/lettings_log.rb
@@ -166,7 +166,7 @@ FactoryBot.define do
       joint { 3 }
       address_line1 { "fake address" }
       town_or_city { "London" }
-      ppcodenk { 0 }
+      ppcodenk { 1 }
       tshortfall_known { 1 }
     end
     trait :export do
diff --git a/spec/fixtures/exports/general_needs_log.xml b/spec/fixtures/exports/general_needs_log.xml
index f996d5097..27a995304 100644
--- a/spec/fixtures/exports/general_needs_log.xml
+++ b/spec/fixtures/exports/general_needs_log.xml
@@ -109,7 +109,7 @@
     <tcharge>325.0</tcharge>
     <tshortfall>12.0</tshortfall>
     <chcharge/>
-    <ppcodenk>1</ppcodenk>
+    <ppcodenk>0</ppcodenk>
     <has_benefits>1</has_benefits>
     <renewal>0</renewal>
     <wrent>100.0</wrent>
diff --git a/spec/fixtures/exports/general_needs_log_23_24.xml b/spec/fixtures/exports/general_needs_log_23_24.xml
index 796c0c72e..aa3ca758a 100644
--- a/spec/fixtures/exports/general_needs_log_23_24.xml
+++ b/spec/fixtures/exports/general_needs_log_23_24.xml
@@ -109,7 +109,7 @@
     <tcharge>325.0</tcharge>
     <tshortfall>12.0</tshortfall>
     <chcharge/>
-    <ppcodenk>1</ppcodenk>
+    <ppcodenk>0</ppcodenk>
     <has_benefits>1</has_benefits>
     <renewal>0</renewal>
     <wrent>100.0</wrent>
diff --git a/spec/fixtures/exports/supported_housing_logs.xml b/spec/fixtures/exports/supported_housing_logs.xml
index 032590622..73595e76f 100644
--- a/spec/fixtures/exports/supported_housing_logs.xml
+++ b/spec/fixtures/exports/supported_housing_logs.xml
@@ -108,7 +108,7 @@
     <tcharge>325.0</tcharge>
     <tshortfall>12.0</tshortfall>
     <chcharge/>
-    <ppcodenk>1</ppcodenk>
+    <ppcodenk>0</ppcodenk>
     <has_benefits>1</has_benefits>
     <renewal>0</renewal>
     <wrent>100.0</wrent>
diff --git a/spec/fixtures/files/lettings_log_csv_export_codes.csv b/spec/fixtures/files/lettings_log_csv_export_codes.csv
index e4a1c53e3..2fc1624af 100644
--- a/spec/fixtures/files/lettings_log_csv_export_codes.csv
+++ b/spec/fixtures/files/lettings_log_csv_export_codes.csv
@@ -1,2 +1,2 @@
 id,status,created_by,is_dpo,created_at,updated_by,updated_at,creation_method,old_id,old_form_id,collection_start_year,owning_organisation_name,managing_organisation_name,needstype,lettype,renewal,startdate,renttype,rent_type_detail,irproduct,irproduct_other,lar,tenancycode,propcode,uprn_known,uprn,uprn_confirmed,address_line1,address_line2,town_or_city,county,postcode_full,is_la_inferred,la_label,la,first_time_property_let_as_social_housing,unitletas,rsnvac,newprop,offered,unittype_gn,builtype,wchair,beds,voiddate,vacdays,void_date_value_check,majorrepairs,mrcdate,major_repairs_date_value_check,joint,startertenancy,tenancy,tenancyother,tenancylength,sheltered,declaration,hhmemb,pregnancy_value_check,age1_known,refused,hhtype,totchild,totelder,totadult,age1,retirement_value_check,sex1,ethnic_group,ethnic,national,ecstat1,details_known_2,relat2,age2_known,age2,sex2,ecstat2,details_known_3,relat3,age3_known,age3,sex3,ecstat3,details_known_4,relat4,age4_known,age4,sex4,ecstat4,details_known_5,relat5,age5_known,age5,sex5,ecstat5,details_known_6,relat6,age6_known,age6,sex6,ecstat6,details_known_7,relat7,age7_known,age7,sex7,ecstat7,details_known_8,relat8,age8_known,age8,sex8,ecstat8,armedforces,leftreg,reservist,preg_occ,housingneeds,housingneeds_type,housingneeds_a,housingneeds_b,housingneeds_c,housingneeds_f,housingneeds_g,housingneeds_h,housingneeds_other,illness,illness_type_4,illness_type_5,illness_type_2,illness_type_6,illness_type_7,illness_type_3,illness_type_9,illness_type_8,illness_type_1,illness_type_10,layear,waityear,reason,reasonother,prevten,new_old,homeless,ppcodenk,ppostcode_full,previous_la_known,is_previous_la_inferred,prevloc_label,prevloc,reasonpref,rp_homeless,rp_insan_unsat,rp_medwel,rp_hardship,rp_dontknow,cbl,cap,chr,letting_allocation_unknown,referral,net_income_known,incref,earnings,incfreq,net_income_value_check,hb,has_benefits,benefits,household_charge,nocharge,period,is_carehome,chcharge,wchchrg,carehome_charges_value_check,brent,wrent,rent_value_check,scharge,wscharge,pscharge,wpschrge,supcharg,wsupchrg,tcharge,wtcharge,hbrentshortfall,tshortfall_known,tshortfall,wtshortfall,scheme_code,scheme_service_name,scheme_sensitive,SCHTYPE,scheme_registered_under_care_act,scheme_owning_organisation_name,scheme_primary_client_group,scheme_has_other_client_group,scheme_secondary_client_group,scheme_support_type,scheme_intended_stay,scheme_created_at,location_code,location_postcode,location_name,location_units,location_type_of_unit,location_mobility_type,location_admin_district,location_startdate
-,completed,s.port@jeemayle.com,false,2023-06-26T00:00:00+01:00,,2023-06-26T00:00:00+01:00,1,,,2023,DLUHC,DLUHC,1,7,0,2023-06-26T00:00:00+01:00,2,1,,,,HIJKLMN,ABCDEFG,0,,,fake address,,London,,NW9 5LL,false,Barnet,E09000003,0,2,6,2,2,7,1,1,3,2023-06-24T00:00:00+01:00,,,1,2023-06-25T00:00:00+01:00,,3,1,4,,2,,1,2,,0,0,4,0,0,2,35,,F,0,2,13,0,0,P,0,32,M,6,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,1,4,1,2,1,0,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,2,7,4,,6,2,1,1,TN23 6LZ,1,false,Ashford,E07000105,1,0,1,0,0,0,0,0,1,,2,0,0,68,1,,6,1,1,,0,2,,,,,200.0,100.0,,50.0,25.0,40.0,20.0,35.0,17.5,325.0,162.5,1,0,12.0,6.0,,,,,,,,,,,,,,,,,,,,
+,completed,s.port@jeemayle.com,false,2023-06-26T00:00:00+01:00,,2023-06-26T00:00:00+01:00,1,,,2023,DLUHC,DLUHC,1,7,0,2023-06-26T00:00:00+01:00,2,1,,,,HIJKLMN,ABCDEFG,0,,,fake address,,London,,NW9 5LL,false,Barnet,E09000003,0,2,6,2,2,7,1,1,3,2023-06-24T00:00:00+01:00,,,1,2023-06-25T00:00:00+01:00,,3,1,4,,2,,1,2,,0,0,4,0,0,2,35,,F,0,2,13,0,0,P,0,32,M,6,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,1,4,1,2,1,0,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,2,7,4,,6,2,1,0,TN23 6LZ,1,false,Ashford,E07000105,1,0,1,0,0,0,0,0,1,,2,0,0,68,1,,6,1,1,,0,2,,,,,200.0,100.0,,50.0,25.0,40.0,20.0,35.0,17.5,325.0,162.5,1,0,12.0,6.0,,,,,,,,,,,,,,,,,,,,
diff --git a/spec/fixtures/files/lettings_log_csv_export_non_support_codes.csv b/spec/fixtures/files/lettings_log_csv_export_non_support_codes.csv
index 4cfdc963c..8847034ee 100644
--- a/spec/fixtures/files/lettings_log_csv_export_non_support_codes.csv
+++ b/spec/fixtures/files/lettings_log_csv_export_non_support_codes.csv
@@ -1,2 +1,2 @@
 id,status,created_by,is_dpo,created_at,updated_by,updated_at,creation_method,collection_start_year,owning_organisation_name,managing_organisation_name,lettype,renewal,startdate,irproduct,irproduct_other,lar,tenancycode,propcode,uprn_known,uprn,address_line1,address_line2,town_or_city,county,postcode_full,la_label,unitletas,rsnvac,newprop,offered,unittype_gn,builtype,wchair,beds,voiddate,void_date_value_check,majorrepairs,mrcdate,major_repairs_date_value_check,joint,startertenancy,tenancy,tenancyother,tenancylength,sheltered,declaration,refused,age1,sex1,ethnic_group,ethnic,national,ecstat1,relat2,age2,sex2,ecstat2,relat3,age3,sex3,ecstat3,relat4,age4,sex4,ecstat4,relat5,age5,sex5,ecstat5,relat6,age6,sex6,ecstat6,relat7,age7,sex7,ecstat7,relat8,age8,sex8,ecstat8,armedforces,leftreg,reservist,preg_occ,housingneeds,housingneeds_type,housingneeds_a,housingneeds_b,housingneeds_c,housingneeds_f,housingneeds_g,housingneeds_h,housingneeds_other,illness,illness_type_4,illness_type_5,illness_type_2,illness_type_6,illness_type_7,illness_type_3,illness_type_9,illness_type_8,illness_type_1,illness_type_10,layear,waityear,reason,reasonother,prevten,homeless,ppcodenk,ppostcode_full,prevloc_label,reasonpref,rp_homeless,rp_insan_unsat,rp_medwel,rp_hardship,rp_dontknow,cbl,cap,chr,referral,incref,earnings,incfreq,hb,has_benefits,benefits,household_charge,nocharge,period,chcharge,wchchrg,carehome_charges_value_check,brent,scharge,pscharge,supcharg,tcharge,hbrentshortfall,tshortfall,scheme_code,scheme_service_name,scheme_sensitive,SCHTYPE,scheme_registered_under_care_act,scheme_owning_organisation_name,scheme_primary_client_group,scheme_has_other_client_group,scheme_secondary_client_group,scheme_support_type,scheme_intended_stay,scheme_created_at,location_code,location_postcode,location_name,location_units,location_type_of_unit,location_mobility_type,location_admin_district,location_startdate
-,completed,choreographer@owtluk.com,false,2023-06-26T00:00:00+01:00,,2023-06-26T00:00:00+01:00,1,2023,DLUHC,DLUHC,7,0,2023-06-26T00:00:00+01:00,,,,HIJKLMN,ABCDEFG,0,,fake address,,London,,NW9 5LL,Barnet,2,6,2,2,7,1,1,3,2023-06-24T00:00:00+01:00,,1,2023-06-25T00:00:00+01:00,,3,1,4,,2,,1,0,35,F,0,2,13,0,P,32,M,6,,,,,,,,,,,,,,,,,,,,,,,,,1,4,1,2,1,0,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,2,7,4,,6,1,1,TN23 6LZ,Ashford,1,0,1,0,0,0,0,0,1,2,0,68,1,6,1,1,,0,2,,,,200.0,50.0,40.0,35.0,325.0,1,12.0,,,,,,,,,,,,,,,,,,,,
+,completed,choreographer@owtluk.com,false,2023-06-26T00:00:00+01:00,,2023-06-26T00:00:00+01:00,1,2023,DLUHC,DLUHC,7,0,2023-06-26T00:00:00+01:00,,,,HIJKLMN,ABCDEFG,0,,fake address,,London,,NW9 5LL,Barnet,2,6,2,2,7,1,1,3,2023-06-24T00:00:00+01:00,,1,2023-06-25T00:00:00+01:00,,3,1,4,,2,,1,0,35,F,0,2,13,0,P,32,M,6,,,,,,,,,,,,,,,,,,,,,,,,,1,4,1,2,1,0,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,2,7,4,,6,1,0,TN23 6LZ,Ashford,1,0,1,0,0,0,0,0,1,2,0,68,1,6,1,1,,0,2,,,,200.0,50.0,40.0,35.0,325.0,1,12.0,,,,,,,,,,,,,,,,,,,,
diff --git a/spec/lib/tasks/correct_ppcodenk_values_spec.rb b/spec/lib/tasks/correct_ppcodenk_values_spec.rb
new file mode 100644
index 000000000..fabfd05f3
--- /dev/null
+++ b/spec/lib/tasks/correct_ppcodenk_values_spec.rb
@@ -0,0 +1,67 @@
+require "rails_helper"
+require "rake"
+
+RSpec.describe "correct_ppcodenk_values" do
+  describe ":correct_ppcodenk_values", type: :task do
+    subject(:task) { Rake::Task["correct_ppcodenk_values"] }
+
+    before do
+      Rake.application.rake_require("tasks/correct_ppcodenk_values")
+      Rake::Task.define_task(:environment)
+      task.reenable
+    end
+
+    context "when the rake task is run" do
+      let!(:lettings_log) { create(:lettings_log, :completed) }
+
+      it "updates lettings logs with ppcodenk 0 to have ppcodenk 1" do
+        lettings_log.update!(ppcodenk: 0)
+        task.invoke
+        expect(lettings_log.reload.ppcodenk).to eq(1)
+      end
+
+      it "updates lettings logs with ppcodenk 1 to have ppcodenk 0" do
+        lettings_log.update!(ppcodenk: 1)
+        task.invoke
+        expect(lettings_log.reload.ppcodenk).to eq(0)
+      end
+
+      it "does not update lettings logs with ppcodenk nil" do
+        lettings_log.update!(ppcodenk: nil)
+        task.invoke
+        expect(lettings_log.reload.ppcodenk).to eq(nil)
+      end
+
+      context "with multiple lettings logs" do
+        let(:lettings_log_2) { create(:lettings_log, :completed) }
+        let(:lettings_log_3) { create(:lettings_log, :completed) }
+
+        it "only updates each log once" do
+          lettings_log.update!(ppcodenk: nil)
+          lettings_log_2.update!(ppcodenk: 0)
+          lettings_log_3.update!(ppcodenk: 1)
+          task.invoke
+          expect(lettings_log.reload.ppcodenk).to eq(nil)
+          expect(lettings_log_2.reload.ppcodenk).to eq(1)
+          expect(lettings_log_3.reload.ppcodenk).to eq(0)
+        end
+      end
+
+      it "does not update updated_at value" do
+        lettings_log.updated_at = Time.zone.local(2021, 3, 3)
+        lettings_log.save!(validate: false)
+        expect(lettings_log.updated_at.to_date).to eq(Time.zone.local(2021, 3, 3))
+        task.invoke
+        expect(lettings_log.updated_at.to_date).to eq(Time.zone.local(2021, 3, 3))
+      end
+
+      it "skips validations for previous years" do
+        lettings_log.update!(ppcodenk: 1)
+        lettings_log.startdate = Time.zone.local(2021, 3, 3)
+        lettings_log.save!(validate: false)
+        task.invoke
+        expect(lettings_log.reload.ppcodenk).to eq(0)
+      end
+    end
+  end
+end
diff --git a/spec/models/form/question_spec.rb b/spec/models/form/question_spec.rb
index 08d08032f..4c3579793 100644
--- a/spec/models/form/question_spec.rb
+++ b/spec/models/form/question_spec.rb
@@ -60,37 +60,9 @@ RSpec.describe Form::Question, type: :model do
   end
 
   it "has a yes value helper" do
-    expect(question).to be_value_is_yes("Yes", true)
-    expect(question).to be_value_is_yes("YES", true)
-    expect(question).not_to be_value_is_yes("random", true)
-  end
-
-  it "has a no value helper" do
-    expect(question).to be_value_is_no("No", true)
-    expect(question).to be_value_is_no("NO", true)
-    expect(question).not_to be_value_is_no("random", true)
-  end
-
-  context "when there are different value helper values for lettings and sales" do
-    context "with a lettings log" do
-      let(:lettings_log) { FactoryBot.build(:lettings_log, :in_progress) }
-      let(:question) { Form::Lettings::Questions::Ppcodenk.new(nil, nil, Form::Lettings::Pages::PreviousPostcode.new("previous_postcode", nil, Form::Lettings::Subsections::HouseholdSituation.new(nil, nil, Form::Lettings::Sections::Household))) }
-
-      it "has the correct values" do
-        expect(question.value_is_yes?(1, lettings_log.lettings?)).to be true
-        expect(question.value_is_no?(0, lettings_log.lettings?)).to be true
-      end
-    end
-
-    context "with a sales log" do
-      let(:sales_log) { FactoryBot.build(:sales_log, :in_progress) }
-      let(:question) { Form::Sales::Questions::PreviousPostcodeKnown.new(nil, nil, Form::Sales::Pages::LastAccommodation.new("previous_postcode", nil, Form::Sales::Subsections::HouseholdSituation.new(nil, nil, Form::Sales::Sections::Household))) }
-
-      it "has the correct values" do
-        expect(question.value_is_yes?(0, sales_log.lettings?)).to be true
-        expect(question.value_is_no?(1, sales_log.lettings?)).to be true
-      end
-    end
+    expect(question).to be_value_is_yes("Yes")
+    expect(question).to be_value_is_yes("YES")
+    expect(question).not_to be_value_is_yes("random")
   end
 
   context "when type is numeric" do
@@ -130,10 +102,8 @@ RSpec.describe Form::Question, type: :model do
       let(:question_id) { "illness" }
 
       it "maps those options" do
-        expect(question).to be_value_is_yes(1, true)
-        expect(question).not_to be_value_is_no(1, true)
+        expect(question).to be_value_is_yes(1)
         expect(question).not_to be_value_is_refused(1)
-        expect(question).to be_value_is_no(2, true)
         expect(question).to be_value_is_dont_know(3)
       end
     end
@@ -145,8 +115,7 @@ RSpec.describe Form::Question, type: :model do
       let(:question_id) { "layear" }
 
       it "maps those options" do
-        expect(question).not_to be_value_is_yes(7, true)
-        expect(question).not_to be_value_is_no(7, true)
+        expect(question).not_to be_value_is_yes(7)
         expect(question).not_to be_value_is_refused(7)
         expect(question).to be_value_is_dont_know(7)
       end
@@ -231,13 +200,8 @@ RSpec.describe Form::Question, type: :model do
     end
 
     it "can map yes values" do
-      expect(question).to be_value_is_yes(1, true)
-      expect(question).not_to be_value_is_yes(0, true)
-    end
-
-    it "can map no values" do
-      expect(question).to be_value_is_no(0, true)
-      expect(question).not_to be_value_is_no(1, true)
+      expect(question).to be_value_is_yes(1)
+      expect(question).not_to be_value_is_yes(0)
     end
   end
 
diff --git a/spec/models/lettings_log_spec.rb b/spec/models/lettings_log_spec.rb
index e89015233..74a04f9e6 100644
--- a/spec/models/lettings_log_spec.rb
+++ b/spec/models/lettings_log_spec.rb
@@ -1329,7 +1329,7 @@ RSpec.describe LettingsLog do
           managing_organisation: owning_organisation,
           owning_organisation:,
           created_by: created_by_user,
-          ppcodenk: 1,
+          ppcodenk: 0,
           ppostcode_full: "M1 1AE",
         })
       end
@@ -1369,7 +1369,7 @@ RSpec.describe LettingsLog do
       end
 
       it "correctly resets all fields if previous postcode not known" do
-        address_lettings_log.update!({ ppcodenk: 0 })
+        address_lettings_log.update!({ ppcodenk: 1 })
 
         record_from_db = described_class.find(address_lettings_log.id)
         expect(record_from_db["ppostcode_full"]).to eq(nil)
@@ -1378,7 +1378,7 @@ RSpec.describe LettingsLog do
       end
 
       it "correctly resets la if la is not known" do
-        address_lettings_log.update!({ ppcodenk: 0 })
+        address_lettings_log.update!({ ppcodenk: 1 })
         address_lettings_log.update!({ previous_la_known: 1, prevloc: "S92000003" })
         record_from_db = described_class.find(address_lettings_log.id)
         expect(record_from_db["prevloc"]).to eq("S92000003")
@@ -1391,7 +1391,7 @@ RSpec.describe LettingsLog do
       end
 
       it "changes the prevloc if previous postcode changes from not known to known and provided" do
-        address_lettings_log.update!({ ppcodenk: 0 })
+        address_lettings_log.update!({ ppcodenk: 1 })
         address_lettings_log.update!({ previous_la_known: 1, prevloc: "E09000033" })
 
         record_from_db = described_class.find(address_lettings_log.id)
diff --git a/spec/models/validations/local_authority_validations_spec.rb b/spec/models/validations/local_authority_validations_spec.rb
index 1c0388c34..3b903e4dc 100644
--- a/spec/models/validations/local_authority_validations_spec.rb
+++ b/spec/models/validations/local_authority_validations_spec.rb
@@ -4,35 +4,35 @@ RSpec.describe Validations::LocalAuthorityValidations do
   subject(:local_auth_validator) { validator_class.new }
 
   let(:validator_class) { Class.new { include Validations::LocalAuthorityValidations } }
-  let(:record) { FactoryBot.create(:lettings_log) }
+  let(:log) { create(:lettings_log) }
 
   describe "#validate_previous_accommodation_postcode" do
-    it "does not add an error if the record ppostcode_full is missing" do
-      record.ppostcode_full = nil
-      local_auth_validator.validate_previous_accommodation_postcode(record)
-      expect(record.errors).to be_empty
+    it "does not add an error if the log ppostcode_full is missing" do
+      log.ppostcode_full = nil
+      local_auth_validator.validate_previous_accommodation_postcode(log)
+      expect(log.errors).to be_empty
     end
 
-    it "does not add an error if the record ppostcode_full is valid (uppercase space)" do
-      record.ppcodenk = 1
-      record.ppostcode_full = "M1 1AE"
-      local_auth_validator.validate_previous_accommodation_postcode(record)
-      expect(record.errors).to be_empty
+    it "does not add an error if the log ppostcode_full is valid (uppercase space)" do
+      log.ppcodenk = 0
+      log.ppostcode_full = "M1 1AE"
+      local_auth_validator.validate_previous_accommodation_postcode(log)
+      expect(log.errors).to be_empty
     end
 
-    it "does not add an error if the record ppostcode_full is valid (lowercase no space)" do
-      record.ppcodenk = 1
-      record.ppostcode_full = "m11ae"
-      local_auth_validator.validate_previous_accommodation_postcode(record)
-      expect(record.errors).to be_empty
+    it "does not add an error if the log ppostcode_full is valid (lowercase no space)" do
+      log.ppcodenk = 0
+      log.ppostcode_full = "m11ae"
+      local_auth_validator.validate_previous_accommodation_postcode(log)
+      expect(log.errors).to be_empty
     end
 
     it "does add an error when the postcode is invalid" do
-      record.ppcodenk = 1
-      record.ppostcode_full = "invalid"
-      local_auth_validator.validate_previous_accommodation_postcode(record)
-      expect(record.errors).not_to be_empty
-      expect(record.errors["ppostcode_full"]).to include(match I18n.t("validations.postcode"))
+      log.ppcodenk = 0
+      log.ppostcode_full = "invalid"
+      local_auth_validator.validate_previous_accommodation_postcode(log)
+      expect(log.errors).not_to be_empty
+      expect(log.errors["ppostcode_full"]).to include(match I18n.t("validations.postcode"))
     end
   end
 end
diff --git a/spec/services/bulk_upload/lettings/log_creator_spec.rb b/spec/services/bulk_upload/lettings/log_creator_spec.rb
index 03724577b..6dfaff46c 100644
--- a/spec/services/bulk_upload/lettings/log_creator_spec.rb
+++ b/spec/services/bulk_upload/lettings/log_creator_spec.rb
@@ -67,7 +67,7 @@ RSpec.describe BulkUpload::Lettings::LogCreator do
           waityear: 9,
           joint: 2,
           tenancy: 9,
-          ppcodenk: 0,
+          ppcodenk: 1,
         )
       end
 
@@ -153,7 +153,7 @@ RSpec.describe BulkUpload::Lettings::LogCreator do
           waityear: 9,
           joint: 2,
           tenancy: 9,
-          ppcodenk: 0,
+          ppcodenk: 1,
         )
       end
 
diff --git a/spec/services/bulk_upload/lettings/year2022/row_parser_spec.rb b/spec/services/bulk_upload/lettings/year2022/row_parser_spec.rb
index 6b5eaa2ae..7380ca550 100644
--- a/spec/services/bulk_upload/lettings/year2022/row_parser_spec.rb
+++ b/spec/services/bulk_upload/lettings/year2022/row_parser_spec.rb
@@ -1562,7 +1562,7 @@ RSpec.describe BulkUpload::Lettings::Year2022::RowParser do
       let(:attributes) { { bulk_upload:, field_65: "2" } }
 
       it "sets correct value from mapping" do
-        expect(parser.log.ppcodenk).to eq(0)
+        expect(parser.log.ppcodenk).to eq(1)
       end
     end
 
diff --git a/spec/services/bulk_upload/lettings/year2023/row_parser_spec.rb b/spec/services/bulk_upload/lettings/year2023/row_parser_spec.rb
index cac166f46..c2f816ab6 100644
--- a/spec/services/bulk_upload/lettings/year2023/row_parser_spec.rb
+++ b/spec/services/bulk_upload/lettings/year2023/row_parser_spec.rb
@@ -1642,7 +1642,7 @@ RSpec.describe BulkUpload::Lettings::Year2023::RowParser do
       let(:attributes) { { bulk_upload:, field_106: "2" } }
 
       it "sets correct value from mapping" do
-        expect(parser.log.ppcodenk).to eq(0)
+        expect(parser.log.ppcodenk).to eq(1)
       end
     end
 
diff --git a/spec/services/bulk_upload/processor_spec.rb b/spec/services/bulk_upload/processor_spec.rb
index f01f2daf7..9f287c592 100644
--- a/spec/services/bulk_upload/processor_spec.rb
+++ b/spec/services/bulk_upload/processor_spec.rb
@@ -176,7 +176,7 @@ RSpec.describe BulkUpload::Processor do
           waityear: 9,
           joint: 2,
           tenancy: 9,
-          ppcodenk: 0,
+          ppcodenk: 1,
           voiddate: nil,
           mrcdate: nil,
           startdate: Date.new(2022, 10, 1),
@@ -385,7 +385,7 @@ RSpec.describe BulkUpload::Processor do
           waityear: 9,
           joint: 2,
           tenancy: 2,
-          ppcodenk: 0,
+          ppcodenk: 1,
           voiddate: Date.new(2022, 1, 1),
           reason: 40,
           leftreg: 3,