diff --git a/app/models/log.rb b/app/models/log.rb
index 5354b3ba5..c1778b299 100644
--- a/app/models/log.rb
+++ b/app/models/log.rb
@@ -45,6 +45,7 @@ class Log < ApplicationRecord
   }
   scope :created_by, ->(user) { where(created_by: user) }
   scope :imported, -> { where.not(old_id: nil) }
+  scope :not_imported, -> { where(old_id: nil) }
 
   attr_accessor :skip_update_status, :skip_update_uprn_confirmed
 
diff --git a/app/services/imports/lettings_logs_import_service.rb b/app/services/imports/lettings_logs_import_service.rb
index 4d837ad77..0083bda35 100644
--- a/app/services/imports/lettings_logs_import_service.rb
+++ b/app/services/imports/lettings_logs_import_service.rb
@@ -298,7 +298,7 @@ module Imports
           end
           record
         else
-          duplicate_logs = lettings_log.owning_organisation.owned_lettings_logs.duplicate_logs(lettings_log)
+          duplicate_logs = lettings_log.owning_organisation.owned_lettings_logs.not_imported.duplicate_logs(lettings_log)
           if duplicate_logs.count.positive?
             @logger.info("Duplicate log with id #{duplicate_logs.map(&:id).join(', ')} found for log #{lettings_log.old_id}, skipping log")
           else
diff --git a/app/services/imports/sales_logs_import_service.rb b/app/services/imports/sales_logs_import_service.rb
index f2d9d8966..d55ace377 100644
--- a/app/services/imports/sales_logs_import_service.rb
+++ b/app/services/imports/sales_logs_import_service.rb
@@ -232,7 +232,7 @@ module Imports
           end
           record
         else
-          duplicate_logs = sales_log.owning_organisation.owned_sales_logs.duplicate_logs(sales_log)
+          duplicate_logs = sales_log.owning_organisation.owned_sales_logs.not_imported.duplicate_logs(sales_log)
           if duplicate_logs.count.positive?
             @logger.info("Duplicate log with id #{duplicate_logs.map(&:id).join(', ')} found for log #{sales_log.old_id}, skipping log")
           else
diff --git a/spec/services/imports/lettings_logs_import_service_spec.rb b/spec/services/imports/lettings_logs_import_service_spec.rb
index 45bfd3331..704d39d14 100644
--- a/spec/services/imports/lettings_logs_import_service_spec.rb
+++ b/spec/services/imports/lettings_logs_import_service_spec.rb
@@ -119,6 +119,19 @@ RSpec.describe Imports::LettingsLogsImportService do
         expect(LettingsLog.count).to eq(3)
       end
 
+      it "imports the log if a duplicate imported log exists on the system (with different legacy ID)" do
+        expect(logger).not_to receive(:error)
+        expect(logger).not_to receive(:warn)
+        expect(logger).not_to receive(:info).with(/Updating lettings log/)
+
+        lettings_log_service.create_logs(remote_folder)
+        expect(LettingsLog.count).to eq(3)
+        LettingsLog.all.each { |log| log.update(old_id: "old_id_#{rand(1..999_999)}") }
+
+        lettings_log_service.create_logs(remote_folder)
+        expect(LettingsLog.count).to eq(6)
+      end
+
       context "with updates allowed" do
         subject(:lettings_log_service) { described_class.new(storage_service, logger, allow_updates: true) }
 
@@ -167,7 +180,6 @@ RSpec.describe Imports::LettingsLogsImportService do
           expect(logger).to receive(:error).with("Lettings log 'fake_id' belongs to legacy user with owner-user-id: 'fake_id' which cannot be found. Assigning log to 'Unassigned' user.")
           lettings_log_service.send(:create_log, lettings_log_xml)
           lettings_log_xml.at_xpath("//meta:document-id").content = "fake_id"
-          lettings_log_xml.at_xpath("//xmlns:_2bTenCode").content = "fake_code"
           lettings_log_service.send(:create_log, lettings_log_xml)
 
           lettings_log = LettingsLog.where(old_id: lettings_log_id).first
@@ -205,7 +217,6 @@ RSpec.describe Imports::LettingsLogsImportService do
           expect(logger).to receive(:error).with("Lettings log 'fake_id' does not have the owner id. Assigning log to 'Unassigned' user.")
           lettings_log_service.send(:create_log, lettings_log_xml)
           lettings_log_xml.at_xpath("//meta:document-id").content = "fake_id"
-          lettings_log_xml.at_xpath("//xmlns:_2bTenCode").content = "fake_code"
           lettings_log_service.send(:create_log, lettings_log_xml)
 
           lettings_log = LettingsLog.where(old_id: lettings_log_id).first
@@ -233,7 +244,6 @@ RSpec.describe Imports::LettingsLogsImportService do
           expect(logger).to receive(:error).with("Lettings log 'fake_id' belongs to legacy user with owner-user-id: 'fake_id' which belongs to a different organisation. Assigning log to 'Unassigned' user.")
           lettings_log_service.send(:create_log, lettings_log_xml)
           lettings_log_xml.at_xpath("//meta:document-id").content = "fake_id"
-          lettings_log_xml.at_xpath("//xmlns:_2bTenCode").content = "fake_code"
           lettings_log_service.send(:create_log, lettings_log_xml)
 
           lettings_log = LettingsLog.where(old_id: lettings_log_id).first
diff --git a/spec/services/imports/sales_logs_import_service_spec.rb b/spec/services/imports/sales_logs_import_service_spec.rb
index a3ceffe80..6ce399a78 100644
--- a/spec/services/imports/sales_logs_import_service_spec.rb
+++ b/spec/services/imports/sales_logs_import_service_spec.rb
@@ -98,6 +98,19 @@ RSpec.describe Imports::SalesLogsImportService do
       expect(SalesLog.count).to eq(4)
     end
 
+    it "imports the log if a duplicate imported log exists on the system (with different legacy ID)" do
+      expect(logger).not_to receive(:error)
+      expect(logger).not_to receive(:warn)
+      expect(logger).not_to receive(:info).with(/Updating sales log/)
+
+      sales_log_service.create_logs(remote_folder)
+      expect(SalesLog.count).to eq(4)
+      SalesLog.all.each { |log| log.update(old_id: "old_id_#{rand(1..999_999)}") }
+
+      sales_log_service.create_logs(remote_folder)
+      expect(SalesLog.count).to eq(8)
+    end
+
     context "with updates allowed" do
       subject(:sales_log_service) { described_class.new(storage_service, logger, allow_updates: true) }
 
@@ -159,7 +172,6 @@ RSpec.describe Imports::SalesLogsImportService do
         expect(logger).to receive(:error).with("Sales log 'fake_id' belongs to legacy user with owner-user-id: 'fake_id' which cannot be found. Assigning log to 'Unassigned' user.")
         sales_log_service.send(:create_log, sales_log_xml)
         sales_log_xml.at_xpath("//meta:document-id").content = "fake_id"
-        sales_log_xml.at_xpath("//xmlns:PurchaserCode").content = "fake_code"
         sales_log_service.send(:create_log, sales_log_xml)
 
         sales_log = SalesLog.where(old_id: sales_log_id).first
@@ -199,7 +211,6 @@ RSpec.describe Imports::SalesLogsImportService do
         expect(logger).to receive(:error).with("Sales log 'fake_id' does not have the owner id. Assigning log to 'Unassigned' user.")
         sales_log_service.send(:create_log, sales_log_xml)
         sales_log_xml.at_xpath("//meta:document-id").content = "fake_id"
-        sales_log_xml.at_xpath("//xmlns:PurchaserCode").content = "fake_code"
         sales_log_service.send(:create_log, sales_log_xml)
 
         sales_log = SalesLog.where(old_id: sales_log_id).first
@@ -229,7 +240,6 @@ RSpec.describe Imports::SalesLogsImportService do
         expect(logger).to receive(:error).with("Sales log 'fake_id' belongs to legacy user with owner-user-id: 'fake_id' which belongs to a different organisation. Assigning log to 'Unassigned' user.")
         sales_log_service.send(:create_log, sales_log_xml)
         sales_log_xml.at_xpath("//meta:document-id").content = "fake_id"
-        sales_log_xml.at_xpath("//xmlns:PurchaserCode").content = "fake_code"
         sales_log_service.send(:create_log, sales_log_xml)
 
         sales_log = SalesLog.where(old_id: sales_log_id).first