diff --git a/app/components/check_answers_summary_list_card_component.rb b/app/components/check_answers_summary_list_card_component.rb
index c9409462a..d4e7650de 100644
--- a/app/components/check_answers_summary_list_card_component.rb
+++ b/app/components/check_answers_summary_list_card_component.rb
@@ -35,17 +35,13 @@ class CheckAnswersSummaryListCardComponent < ViewComponent::Base
 private
 
   def unanswered_value
-    if bulk_uploaded?
+    if log.creation_method_bulk_upload?
       "<span class=\"app-!-colour-red\">You still need to answer this question</span>".html_safe
     else
       "<span class=\"app-!-colour-muted\">You didn’t answer this question</span>".html_safe
     end
   end
 
-  def bulk_uploaded?
-    log.bulk_upload
-  end
-
   def number_of_buyers
     log[:jointpur] == 1 ? 2 : 1
   end
diff --git a/app/helpers/check_answers_helper.rb b/app/helpers/check_answers_helper.rb
index 7d55594ee..d235dbc6f 100644
--- a/app/helpers/check_answers_helper.rb
+++ b/app/helpers/check_answers_helper.rb
@@ -54,14 +54,10 @@ private
   end
 
   def unanswered_value(log:)
-    if bulk_uploaded?(log:)
+    if log.creation_method_bulk_upload?
       "<span class=\"app-!-colour-red\">You still need to answer this question</span>".html_safe
     else
       "<span class=\"app-!-colour-muted\">You didn’t answer this question</span>".html_safe
     end
   end
-
-  def bulk_uploaded?(log:)
-    log.bulk_upload
-  end
 end
diff --git a/app/helpers/log_actions_helper.rb b/app/helpers/log_actions_helper.rb
index 8f02ccbf5..d6949e0cb 100644
--- a/app/helpers/log_actions_helper.rb
+++ b/app/helpers/log_actions_helper.rb
@@ -16,7 +16,7 @@ private
 
   def back_button_for(log)
     if log.completed?
-      if log.bulk_uploaded?
+      if log.creation_method_bulk_upload?
         if log.lettings?
           govuk_button_link_to "Back to uploaded logs", resume_bulk_upload_lettings_result_path(log.bulk_upload)
         else
diff --git a/app/models/log.rb b/app/models/log.rb
index 3a6361e36..699bbae3f 100644
--- a/app/models/log.rb
+++ b/app/models/log.rb
@@ -24,7 +24,7 @@ class Log < ApplicationRecord
     "single log" => 1,
     "bulk upload" => 2,
   }.freeze
-  enum creation_method: CREATION_METHOD
+  enum creation_method: CREATION_METHOD, _prefix: true
 
   scope :visible, -> { where(status: %w[not_started in_progress completed]) }
   scope :exportable, -> { where(status: %w[not_started in_progress completed deleted]) }
@@ -184,10 +184,6 @@ class Log < ApplicationRecord
     end
   end
 
-  def bulk_uploaded?
-    bulk_upload_id.present?
-  end
-
   def collection_closed_for_editing?
     form.edit_end_date < Time.zone.now || older_than_previous_collection_year?
   end
diff --git a/app/services/bulk_upload/lettings/log_creator.rb b/app/services/bulk_upload/lettings/log_creator.rb
index 02852a2a5..99cfd4390 100644
--- a/app/services/bulk_upload/lettings/log_creator.rb
+++ b/app/services/bulk_upload/lettings/log_creator.rb
@@ -14,7 +14,7 @@ class BulkUpload::Lettings::LogCreator
 
       row_parser.log.blank_invalid_non_setup_fields!
       row_parser.log.bulk_upload = bulk_upload
-      row_parser.log.creation_method = "bulk upload"
+      row_parser.log.creation_method_bulk_upload!
       row_parser.log.skip_update_status = true
       row_parser.log.status = "pending"
       row_parser.log.status_cache = row_parser.log.calculate_status
diff --git a/app/services/bulk_upload/sales/log_creator.rb b/app/services/bulk_upload/sales/log_creator.rb
index 5aa9d01c8..3028914b9 100644
--- a/app/services/bulk_upload/sales/log_creator.rb
+++ b/app/services/bulk_upload/sales/log_creator.rb
@@ -14,7 +14,7 @@ class BulkUpload::Sales::LogCreator
 
       row_parser.log.blank_invalid_non_setup_fields!
       row_parser.log.bulk_upload = bulk_upload
-      row_parser.log.creation_method = "bulk upload"
+      row_parser.log.creation_method_bulk_upload!
       row_parser.log.skip_update_status = true
       row_parser.log.status = "pending"
       row_parser.log.status_cache = row_parser.log.calculate_status
diff --git a/app/services/imports/lettings_logs_field_import_service.rb b/app/services/imports/lettings_logs_field_import_service.rb
index 61fe3e829..9148c99b7 100644
--- a/app/services/imports/lettings_logs_field_import_service.rb
+++ b/app/services/imports/lettings_logs_field_import_service.rb
@@ -49,10 +49,10 @@ module Imports
         when "Manual Entry"
           @logger.info "lettings log with old id #{old_id} entered manually, no need for update"
         when "Bulk Upload"
-          if log.creation_method == "bulk upload"
+          if log.creation_method_bulk_upload?
             @logger.info "lettings log #{log.id} creation method already set to bulk upload, no need for update"
           else
-            log.update!(creation_method: "bulk upload")
+            log.creation_method_bulk_upload!
             @logger.info "lettings log #{log.id} creation method set to bulk upload"
           end
         end
diff --git a/app/services/imports/sales_logs_field_import_service.rb b/app/services/imports/sales_logs_field_import_service.rb
index 5aafd29e3..d34aa878a 100644
--- a/app/services/imports/sales_logs_field_import_service.rb
+++ b/app/services/imports/sales_logs_field_import_service.rb
@@ -22,10 +22,10 @@ module Imports
         when "Manual Entry"
           @logger.info "sales log with old id #{old_id} entered manually, no need for update"
         when "Bulk Upload"
-          if log.creation_method == "bulk upload"
+          if log.creation_method_bulk_upload?
             @logger.info "sales log #{log.id} creation method already set to bulk upload, no need for update"
           else
-            log.update!(creation_method: "bulk upload")
+            log.creation_method_bulk_upload!
             @logger.info "sales log #{log.id} creation method set to bulk upload"
           end
         end
diff --git a/lib/tasks/creation_method.rake b/lib/tasks/creation_method.rake
new file mode 100644
index 000000000..7dde5ad80
--- /dev/null
+++ b/lib/tasks/creation_method.rake
@@ -0,0 +1,5 @@
+desc "set creation method to bulk upload if a log has a bulk upload id"
+task set_creation_method: :environment do
+  LettingsLog.where.not(bulk_upload_id: nil).each(&:creation_method_bulk_upload!)
+  SalesLog.where.not(bulk_upload_id: nil).each(&:creation_method_bulk_upload!)
+end
diff --git a/spec/components/check_answers_summary_list_card_component_spec.rb b/spec/components/check_answers_summary_list_card_component_spec.rb
index 842f55e14..3dcafe104 100644
--- a/spec/components/check_answers_summary_list_card_component_spec.rb
+++ b/spec/components/check_answers_summary_list_card_component_spec.rb
@@ -40,8 +40,7 @@ RSpec.describe CheckAnswersSummaryListCardComponent, type: :component do
       context "when log was created via a bulk upload and has an unanswered question" do
         subject(:component) { described_class.new(questions:, log:, user:) }
 
-        let(:bulk_upload) { build(:bulk_upload, :lettings) }
-        let(:log) { build(:lettings_log, :in_progress, bulk_upload:, age2: 99, startdate: Time.zone.local(2021, 5, 1)) }
+        let(:log) { build(:lettings_log, :in_progress, creation_method: "bulk upload", age2: 99, startdate: Time.zone.local(2021, 5, 1)) }
 
         it "displays tweaked copy in red" do
           expect(rendered).to have_selector("span", class: "app-!-colour-red", text: "You still need to answer this question")
diff --git a/spec/helpers/check_answers_helper_spec.rb b/spec/helpers/check_answers_helper_spec.rb
index a31c6bf16..f633801cb 100644
--- a/spec/helpers/check_answers_helper_spec.rb
+++ b/spec/helpers/check_answers_helper_spec.rb
@@ -39,8 +39,7 @@ RSpec.describe CheckAnswersHelper do
   describe "#get_answer_label" do
     context "when unanswered and bulk upload" do
       let(:question) { log.form.questions.sample }
-      let(:bulk_upload) { build(:bulk_upload, :sales) }
-      let(:log) { build(:sales_log, bulk_upload:) }
+      let(:log) { build(:sales_log, creation_method: "bulk upload") }
 
       it "is red" do
         expect(get_answer_label(question, log)).to include("red")
diff --git a/spec/services/imports/lettings_logs_field_import_service_spec.rb b/spec/services/imports/lettings_logs_field_import_service_spec.rb
index b151e1bf0..7a9767aa2 100644
--- a/spec/services/imports/lettings_logs_field_import_service_spec.rb
+++ b/spec/services/imports/lettings_logs_field_import_service_spec.rb
@@ -106,7 +106,7 @@ RSpec.describe Imports::LettingsLogsFieldImportService do
       let(:lettings_log_id) { "166fc004-392e-47a8-acb8-1c018734882b" }
 
       it "logs that bulk upload id does not need setting" do
-        lettings_log.update!(creation_method: "single log")
+        lettings_log.creation_method_single_log!
         expect(logger).to receive(:info).with(/lettings log \d+ creation method set to bulk upload/)
         expect { import_service.update_field(field, remote_folder) }.to change { lettings_log.reload.creation_method }.to "bulk upload"
       end
diff --git a/spec/services/imports/sales_logs_field_import_service_spec.rb b/spec/services/imports/sales_logs_field_import_service_spec.rb
index 36d83b578..b5bdb22a4 100644
--- a/spec/services/imports/sales_logs_field_import_service_spec.rb
+++ b/spec/services/imports/sales_logs_field_import_service_spec.rb
@@ -57,7 +57,7 @@ RSpec.describe Imports::SalesLogsFieldImportService do
       let(:sales_log_filename) { "shared_ownership_sales_log2" }
 
       it "logs that bulk upload id does not need setting" do
-        sales_log.update!(creation_method: "single log")
+        sales_log.creation_method_single_log!
         expect(logger).to receive(:info).with(/sales log \d+ creation method set to bulk upload/)
         expect { import_service.update_field(field, remote_folder) }.to change { sales_log.reload.creation_method }.to "bulk upload"
       end
diff --git a/spec/views/logs/edit.html.erb_spec.rb b/spec/views/logs/edit.html.erb_spec.rb
index 6ac12230d..e28e0bc4b 100644
--- a/spec/views/logs/edit.html.erb_spec.rb
+++ b/spec/views/logs/edit.html.erb_spec.rb
@@ -69,7 +69,7 @@ RSpec.describe "logs/edit.html.erb" do
 
     context "when lettings log is bulk uploaded" do
       let(:bulk_upload) { create(:bulk_upload, :lettings) }
-      let(:log) { create(:lettings_log, :completed, bulk_upload:) }
+      let(:log) { create(:lettings_log, :completed, bulk_upload:, creation_method: "bulk upload") }
 
       it "has link 'Back to uploaded logs'" do
         render
@@ -90,7 +90,7 @@ RSpec.describe "logs/edit.html.erb" do
 
     context "when sales log is bulk uploaded" do
       let(:bulk_upload) { create(:bulk_upload, :sales) }
-      let(:log) { create(:sales_log, :completed, bulk_upload:) }
+      let(:log) { create(:sales_log, :completed, bulk_upload:, creation_method: "bulk upload") }
 
       it "has link 'Back to uploaded logs'" do
         render