diff --git a/app/controllers/duplicate_logs_controller.rb b/app/controllers/duplicate_logs_controller.rb
index 539f06e91..b084a8124 100644
--- a/app/controllers/duplicate_logs_controller.rb
+++ b/app/controllers/duplicate_logs_controller.rb
@@ -62,9 +62,7 @@ private
   end
 
   def find_original_log_id
-    return unless @log
-
     query_params = URI.parse(request.url).query
-    @original_log_id = query_params.present? ? CGI.parse(query_params)["original_log_id"][0]&.to_i : @log.id
+    @original_log_id = CGI.parse(query_params)["original_log_id"][0]&.to_i if query_params.present?
   end
 end
diff --git a/app/controllers/form_controller.rb b/app/controllers/form_controller.rb
index 16d15569f..3cefa6cf4 100644
--- a/app/controllers/form_controller.rb
+++ b/app/controllers/form_controller.rb
@@ -165,10 +165,10 @@ private
     if FeatureToggle.deduplication_flow_enabled?
       if @log.lettings?
         if current_user.lettings_logs.duplicate_logs(@log).count.positive?
-          return send("lettings_log_duplicate_logs_path", @log)
+          return send("lettings_log_duplicate_logs_path", @log, original_log_id: @log.id)
         end
       elsif current_user.sales_logs.duplicate_logs(@log).count.positive?
-        return send("sales_log_duplicate_logs_path", @log)
+        return send("sales_log_duplicate_logs_path", @log, original_log_id: @log.id)
       end
     end
 
diff --git a/spec/features/lettings_log_spec.rb b/spec/features/lettings_log_spec.rb
index 5ed8d807f..d34c73dd1 100644
--- a/spec/features/lettings_log_spec.rb
+++ b/spec/features/lettings_log_spec.rb
@@ -402,7 +402,7 @@ RSpec.describe "Lettings Log Features" do
       end
 
       it "allows keeping the original log and deleting duplicates" do
-        expect(page).to have_current_path("/lettings-logs/#{lettings_log.id}/duplicate-logs")
+        expect(page).to have_current_path("/lettings-logs/#{lettings_log.id}/duplicate-logs?original_log_id=#{lettings_log.id}")
         click_link("Keep this log and delete duplicates", href: "/lettings-logs/#{lettings_log.id}/delete-duplicates?original_log_id=#{lettings_log.id}")
         expect(page).to have_current_path("/lettings-logs/#{lettings_log.id}/delete-duplicates?original_log_id=#{lettings_log.id}")
         click_button "Delete this log"
@@ -426,7 +426,7 @@ RSpec.describe "Lettings Log Features" do
       end
 
       it "allows keeping the duplicate log and deleting the original one" do
-        expect(page).to have_current_path("/lettings-logs/#{lettings_log.id}/duplicate-logs")
+        expect(page).to have_current_path("/lettings-logs/#{lettings_log.id}/duplicate-logs?original_log_id=#{lettings_log.id}")
         click_link("Keep this log and delete duplicates", href: "/lettings-logs/#{duplicate_log.id}/delete-duplicates?original_log_id=#{lettings_log.id}")
         expect(page).to have_current_path("/lettings-logs/#{duplicate_log.id}/delete-duplicates?original_log_id=#{lettings_log.id}")
         click_button "Delete this log"
diff --git a/spec/features/sales_log_spec.rb b/spec/features/sales_log_spec.rb
index 0a6020bec..186dad51d 100644
--- a/spec/features/sales_log_spec.rb
+++ b/spec/features/sales_log_spec.rb
@@ -153,7 +153,7 @@ RSpec.describe "Sales Log Features" do
     end
 
     it "allows keeping the original log and deleting duplicates" do
-      expect(page).to have_current_path("/sales-logs/#{sales_log.id}/duplicate-logs")
+      expect(page).to have_current_path("/sales-logs/#{sales_log.id}/duplicate-logs?original_log_id=#{sales_log.id}")
       click_link("Keep this log and delete duplicates", href: "/sales-logs/#{sales_log.id}/delete-duplicates?original_log_id=#{sales_log.id}")
       expect(page).to have_current_path("/sales-logs/#{sales_log.id}/delete-duplicates?original_log_id=#{sales_log.id}")
       click_button "Delete this log"
@@ -177,7 +177,7 @@ RSpec.describe "Sales Log Features" do
     end
 
     it "allows keeping the duplicate log and deleting the original one" do
-      expect(page).to have_current_path("/sales-logs/#{sales_log.id}/duplicate-logs")
+      expect(page).to have_current_path("/sales-logs/#{sales_log.id}/duplicate-logs?original_log_id=#{sales_log.id}")
       click_link("Keep this log and delete duplicates", href: "/sales-logs/#{duplicate_log.id}/delete-duplicates?original_log_id=#{sales_log.id}")
       expect(page).to have_current_path("/sales-logs/#{duplicate_log.id}/delete-duplicates?original_log_id=#{sales_log.id}")
       click_button "Delete this log"
diff --git a/spec/requests/duplicate_logs_controller_spec.rb b/spec/requests/duplicate_logs_controller_spec.rb
index 221c35bee..1de8af9ae 100644
--- a/spec/requests/duplicate_logs_controller_spec.rb
+++ b/spec/requests/duplicate_logs_controller_spec.rb
@@ -39,7 +39,7 @@ RSpec.describe DuplicateLogsController, type: :request do
 
         before do
           allow(LettingsLog).to receive(:duplicate_logs).and_return(duplicate_logs)
-          get "/lettings-logs/#{lettings_log.id}/duplicate-logs"
+          get "/lettings-logs/#{lettings_log.id}/duplicate-logs?original_log_id=#{lettings_log.id}"
         end
 
         it "displays links to all the duplicate logs" do
@@ -72,7 +72,7 @@ RSpec.describe DuplicateLogsController, type: :request do
 
         before do
           allow(SalesLog).to receive(:duplicate_logs).and_return(duplicate_logs)
-          get "/sales-logs/#{sales_log.id}/duplicate-logs"
+          get "/sales-logs/#{sales_log.id}/duplicate-logs?original_log_id=#{sales_log.id}"
         end
 
         it "displays links to all the duplicate logs" do
diff --git a/spec/requests/form_controller_spec.rb b/spec/requests/form_controller_spec.rb
index a6143f91a..3cfd414b4 100644
--- a/spec/requests/form_controller_spec.rb
+++ b/spec/requests/form_controller_spec.rb
@@ -542,7 +542,7 @@ RSpec.describe FormController, type: :request do
             end
 
             it "redirects to the duplicate logs page" do
-              expect(response).to redirect_to("/lettings-logs/#{lettings_log.id}/duplicate-logs")
+              expect(response).to redirect_to("/lettings-logs/#{lettings_log.id}/duplicate-logs?original_log_id=#{lettings_log.id}")
               follow_redirect!
               expect(page).to have_content("These logs are duplicates")
             end
@@ -575,7 +575,7 @@ RSpec.describe FormController, type: :request do
             end
 
             it "redirects to the duplicate logs page" do
-              expect(response).to redirect_to("/sales-logs/#{sales_log.id}/duplicate-logs")
+              expect(response).to redirect_to("/sales-logs/#{sales_log.id}/duplicate-logs?original_log_id=#{sales_log.id}")
               follow_redirect!
               expect(page).to have_content("These logs are duplicates")
             end