diff --git a/lib/tasks/correct_checkbox_values.rake b/lib/tasks/correct_checkbox_values.rake
new file mode 100644
index 000000000..0bd7c6974
--- /dev/null
+++ b/lib/tasks/correct_checkbox_values.rake
@@ -0,0 +1,20 @@
+desc "Update BU reasonable preference and illness type checkbox values"
+task correct_checkbox_values: :environment do
+  any_reasonpref_selected = "rp_homeless = 1 OR rp_hardship = 1 OR rp_medwel = 1 OR rp_insan_unsat = 1 OR rp_dontknow = 1"
+  any_reasonpref_is_null = "rp_homeless IS NULL OR rp_hardship IS NULL OR rp_medwel IS NULL OR rp_insan_unsat IS NULL OR rp_dontknow IS NULL"
+
+  LettingsLog.filter_by_year(2024).where(reasonpref: 1).where(any_reasonpref_selected).where(any_reasonpref_is_null).find_each do |lettings_log|
+    unless lettings_log.save
+      Rails.logger.info("Failed to save reasonpref for LettingsLog with id #{lettings_log.id}: #{lettings_log.errors.full_messages}")
+    end
+  end
+
+  any_illness_selected = "illness_type_1 = 1 OR illness_type_2 = 1 OR illness_type_3 = 1 OR illness_type_4 = 1 OR illness_type_5 = 1 OR illness_type_6 = 1 OR illness_type_7 = 1 OR illness_type_8 = 1 OR illness_type_9 = 1 OR illness_type_10 = 1"
+  any_illness_is_null = "illness_type_1 IS NULL OR illness_type_2 IS NULL OR illness_type_3 IS NULL OR illness_type_4 IS NULL OR illness_type_5 IS NULL OR illness_type_6 IS NULL OR illness_type_7 IS NULL OR illness_type_8 IS NULL OR illness_type_9 IS NULL OR illness_type_10 IS NULL"
+
+  LettingsLog.filter_by_year(2024).where(illness: 1).where(any_illness_selected).where(any_illness_is_null).find_each do |lettings_log|
+    unless lettings_log.save
+      Rails.logger.info("Failed to save illness for LettingsLog with id #{lettings_log.id}: #{lettings_log.errors.full_messages}")
+    end
+  end
+end
diff --git a/spec/lib/tasks/correct_checkbox_values_spec.rb b/spec/lib/tasks/correct_checkbox_values_spec.rb
new file mode 100644
index 000000000..1557517f0
--- /dev/null
+++ b/spec/lib/tasks/correct_checkbox_values_spec.rb
@@ -0,0 +1,216 @@
+require "rails_helper"
+require "rake"
+
+RSpec.describe "correct_checkbox_values" do
+  describe ":correct_checkbox_values", type: :task do
+    subject(:task) { Rake::Task["correct_checkbox_values"] }
+
+    let(:organisation) { create(:organisation, rent_periods: [2]) }
+    let(:user) { create(:user, organisation:) }
+
+    before do
+      Rake.application.rake_require("tasks/correct_checkbox_values")
+      Rake::Task.define_task(:environment)
+      task.reenable
+    end
+
+    context "when the rake task is run" do
+      context "and any of the reasonable_preference_reason options are 1" do
+        let(:bulk_upload) { create(:bulk_upload, :lettings, year: 2024, rent_type_fix_status: BulkUpload.rent_type_fix_statuses[:not_applied]) }
+
+        it "sets the remaining options to 0" do
+          log = build(:lettings_log, :completed, reasonpref: 1, rp_homeless: 1, rp_hardship: nil, rp_medwel: nil, rp_insan_unsat: nil, rp_dontknow: nil,
+                                                 bulk_upload:, assigned_to: user)
+          log.save!(validate: false)
+          initial_updated_at = log.updated_at
+
+          task.invoke
+          log.reload
+
+          expect(log.updated_at).not_to eq(initial_updated_at)
+          expect(log.status).to eq("completed")
+          expect(log.rp_homeless).to be(1)
+          expect(log.rp_hardship).to be(0)
+          expect(log.rp_medwel).to be(0)
+          expect(log.rp_insan_unsat).to be(0)
+          expect(log.rp_dontknow).to be(0)
+        end
+
+        it "updates the reasonable preference reason values on a pending log" do
+          log = build(:lettings_log, :completed, status: "pending", reasonpref: 1, rp_homeless: 1, rp_hardship: nil, rp_medwel: nil, rp_insan_unsat: nil, rp_dontknow: nil, bulk_upload:, assigned_to: user)
+          log.save!(validate: false)
+          initial_updated_at = log.updated_at
+          expect(log.status).to eq("pending")
+
+          task.invoke
+          log.reload
+          expect(log.rp_homeless).to be(1)
+          expect(log.rp_hardship).to be(0)
+          expect(log.rp_medwel).to be(0)
+          expect(log.rp_insan_unsat).to be(0)
+          expect(log.rp_dontknow).to be(0)
+          expect(log.status).to eq("pending")
+          expect(log.updated_at).not_to eq(initial_updated_at)
+        end
+
+        it "does not update logs if all unselected reasonable preference reason are alredy 0" do
+          log = build(:lettings_log, :completed, reasonpref: 1, rp_homeless: 0, rp_hardship: 1, rp_medwel: 0, rp_insan_unsat: 0, rp_dontknow: 0, bulk_upload:, assigned_to: user)
+          log.save!(validate: false)
+          initial_updated_at = log.updated_at
+          expect(log.status).to eq("completed")
+
+          task.invoke
+          log.reload
+
+          expect(log.status).to eq("completed")
+          expect(log.updated_at).to eq(initial_updated_at)
+        end
+
+        it "updates the reasonable preference reason values if some of the checkbox values are nil" do
+          log = build(:lettings_log, :completed, status: "pending", reasonpref: 1, rp_homeless: 0, rp_hardship: nil, rp_medwel: 1, rp_insan_unsat: 0, rp_dontknow: 0, bulk_upload:, assigned_to: user)
+          log.save!(validate: false)
+          initial_updated_at = log.updated_at
+          expect(log.status).to eq("pending")
+
+          task.invoke
+          log.reload
+          expect(log.rp_homeless).to be(0)
+          expect(log.rp_hardship).to be(0)
+          expect(log.rp_medwel).to be(1)
+          expect(log.rp_insan_unsat).to be(0)
+          expect(log.rp_dontknow).to be(0)
+          expect(log.status).to eq("pending")
+          expect(log.updated_at).not_to eq(initial_updated_at)
+        end
+
+        it "does not update the reasonable preference reason values on a 2023 log" do
+          log = build(:lettings_log, :completed, startdate: Time.zone.local(2023, 6, 6), reasonpref: 1, rp_homeless: 0, rp_hardship: nil, rp_medwel: 1, rp_insan_unsat: 0, rp_dontknow: 0, bulk_upload:, assigned_to: user)
+          log.save!(validate: false)
+          initial_updated_at = log.updated_at
+
+          task.invoke
+          log.reload
+
+          expect(log.updated_at).to eq(initial_updated_at)
+        end
+
+        it "does not update and logs error if a validation triggers" do
+          log = build(:lettings_log, :completed, postcode_full: "0", reasonpref: 1, rp_homeless: 0, rp_hardship: nil, rp_medwel: 1, rp_insan_unsat: 0, rp_dontknow: 0, bulk_upload:, assigned_to: user)
+          log.save!(validate: false)
+          initial_updated_at = log.updated_at
+
+          task.invoke
+          log.reload
+
+          expect(log.updated_at).to eq(initial_updated_at)
+        end
+      end
+
+      context "and any of the illness_type options are 1" do
+        let(:bulk_upload) { create(:bulk_upload, :lettings, year: 2024, rent_type_fix_status: BulkUpload.rent_type_fix_statuses[:not_applied]) }
+
+        it "sets the remaining options to 0" do
+          log = build(:lettings_log, :completed, illness: 1, illness_type_1: 1, illness_type_2: nil, illness_type_3: nil, illness_type_4: nil, illness_type_5: nil, illness_type_6: nil, illness_type_7: nil, illness_type_8: nil, illness_type_9: nil, illness_type_10: nil,
+                                                 bulk_upload:, assigned_to: user)
+          log.save!(validate: false)
+          initial_updated_at = log.updated_at
+
+          task.invoke
+          log.reload
+
+          expect(log.updated_at).not_to eq(initial_updated_at)
+          expect(log.status).to eq("completed")
+          expect(log.illness_type_1).to be(1)
+          expect(log.illness_type_2).to be(0)
+          expect(log.illness_type_3).to be(0)
+          expect(log.illness_type_4).to be(0)
+          expect(log.illness_type_5).to be(0)
+          expect(log.illness_type_6).to be(0)
+          expect(log.illness_type_7).to be(0)
+          expect(log.illness_type_8).to be(0)
+          expect(log.illness_type_9).to be(0)
+          expect(log.illness_type_10).to be(0)
+        end
+
+        it "updates the reasonable preference reason values on a pending log" do
+          log = build(:lettings_log, :completed, status: "pending", illness: 1, illness_type_1: 1, illness_type_2: nil, illness_type_3: nil, illness_type_4: nil, illness_type_5: nil, illness_type_6: nil, illness_type_7: nil, illness_type_8: nil, illness_type_9: nil, illness_type_10: nil, bulk_upload:, assigned_to: user)
+          log.save!(validate: false)
+          initial_updated_at = log.updated_at
+          expect(log.status).to eq("pending")
+
+          task.invoke
+          log.reload
+          expect(log.illness_type_1).to be(1)
+          expect(log.illness_type_2).to be(0)
+          expect(log.illness_type_3).to be(0)
+          expect(log.illness_type_4).to be(0)
+          expect(log.illness_type_5).to be(0)
+          expect(log.illness_type_6).to be(0)
+          expect(log.illness_type_7).to be(0)
+          expect(log.illness_type_8).to be(0)
+          expect(log.illness_type_9).to be(0)
+          expect(log.illness_type_10).to be(0)
+          expect(log.status).to eq("pending")
+          expect(log.updated_at).not_to eq(initial_updated_at)
+        end
+
+        it "does not update logs if all unselected reasonable preference reason are alredy 0" do
+          log = build(:lettings_log, :completed, illness: 1, illness_type_1: 0, illness_type_2: 1, illness_type_3: 0, illness_type_4: 0, illness_type_5: 0, illness_type_6: 0, illness_type_7: 0, illness_type_8: 0, illness_type_9: 0, illness_type_10: 0, bulk_upload:, assigned_to: user)
+          log.save!(validate: false)
+          initial_updated_at = log.updated_at
+          expect(log.status).to eq("completed")
+
+          task.invoke
+          log.reload
+
+          expect(log.status).to eq("completed")
+          expect(log.updated_at).to eq(initial_updated_at)
+        end
+
+        it "updates the reasonable preference reason values if some of the checkbox values are nil" do
+          log = build(:lettings_log, :completed, status: "pending", illness: 1, illness_type_1: 0, illness_type_2: nil, illness_type_3: 1, illness_type_4: 0, illness_type_5: 0, illness_type_6: nil, illness_type_7: nil, illness_type_8: nil, illness_type_9: nil, illness_type_10: nil, bulk_upload:, assigned_to: user)
+          log.save!(validate: false)
+          initial_updated_at = log.updated_at
+          expect(log.status).to eq("pending")
+
+          task.invoke
+          log.reload
+          expect(log.illness_type_1).to be(0)
+          expect(log.illness_type_2).to be(0)
+          expect(log.illness_type_3).to be(1)
+          expect(log.illness_type_4).to be(0)
+          expect(log.illness_type_5).to be(0)
+          expect(log.illness_type_6).to be(0)
+          expect(log.illness_type_7).to be(0)
+          expect(log.illness_type_8).to be(0)
+          expect(log.illness_type_9).to be(0)
+          expect(log.illness_type_10).to be(0)
+          expect(log.status).to eq("pending")
+          expect(log.updated_at).not_to eq(initial_updated_at)
+        end
+
+        it "does not update the reasonable preference reason values on a 2023 log" do
+          log = build(:lettings_log, :completed, startdate: Time.zone.local(2023, 6, 6), illness: 1, illness_type_1: 0, illness_type_2: nil, illness_type_3: 1, illness_type_4: 0, illness_type_5: 0, illness_type_6: nil, illness_type_7: nil, illness_type_8: nil, illness_type_9: nil, illness_type_10: nil, bulk_upload:, assigned_to: user)
+          log.save!(validate: false)
+          initial_updated_at = log.updated_at
+
+          task.invoke
+          log.reload
+
+          expect(log.updated_at).to eq(initial_updated_at)
+        end
+
+        it "does not update and logs error if a validation triggers" do
+          log = build(:lettings_log, :completed, postcode_full: "0", illness: 1, illness_type_1: 0, illness_type_2: nil, illness_type_3: 1, illness_type_4: 0, illness_type_5: 0, illness_type_6: nil, illness_type_7: nil, illness_type_8: nil, illness_type_9: nil, illness_type_10: nil, bulk_upload:, assigned_to: user)
+          log.save!(validate: false)
+          initial_updated_at = log.updated_at
+
+          task.invoke
+          log.reload
+
+          expect(log.updated_at).to eq(initial_updated_at)
+        end
+      end
+    end
+  end
+end