diff --git a/app/controllers/form_controller.rb b/app/controllers/form_controller.rb
index e2b7f59ac..31cc82a51 100644
--- a/app/controllers/form_controller.rb
+++ b/app/controllers/form_controller.rb
@@ -155,9 +155,9 @@ private
 
       next unless question_params
 
-      if %w[checkbox validation_override].include?(question.type)
+      if %w[checkbox].include?(question.type)
         question.answer_keys_without_dividers.each do |option|
-          result[option] = question_params.include?(option) ? 1 : 0
+          result[option] = 1 if question_params.include?(option)
         end
       elsif question.type != "date"
         result[question.id] = question_params
@@ -347,7 +347,7 @@ private
   end
 
   def question_missing_response?(responses_for_page, question)
-    if %w[checkbox validation_override].include?(question.type)
+    if %w[checkbox].include?(question.type)
       answered = question.answer_keys_without_dividers.map do |option|
         session["fields"][option] = @log[option] = params[@log.log_type][question.id].include?(option) ? 1 : 0
         params[@log.log_type][question.id].exclude?(option)
diff --git a/app/models/derived_variables/lettings_log_variables.rb b/app/models/derived_variables/lettings_log_variables.rb
index 90d4e9db2..f584b6238 100644
--- a/app/models/derived_variables/lettings_log_variables.rb
+++ b/app/models/derived_variables/lettings_log_variables.rb
@@ -142,6 +142,8 @@ module DerivedVariables::LettingsLogVariables
     end
 
     reset_address_fields! if is_supported_housing?
+
+    set_checkbox_values!
   end
 
 private
@@ -362,4 +364,17 @@ private
     return 2 if rent_type == 4
     return 3 if rent_type == 5
   end
+
+  def set_checkbox_values!
+    form.questions.select { |q| q.type == "checkbox" }.each do |question|
+      options = question.answer_keys_without_dividers
+      next unless options.any? { |option| self[option] == 1 }
+
+      options.each do |option|
+        if self[option].nil?
+          self[option] = 0
+        end
+      end
+    end
+  end
 end
diff --git a/spec/services/bulk_upload/lettings/year2024/row_parser_spec.rb b/spec/services/bulk_upload/lettings/year2024/row_parser_spec.rb
index b6ea44040..33ab390f4 100644
--- a/spec/services/bulk_upload/lettings/year2024/row_parser_spec.rb
+++ b/spec/services/bulk_upload/lettings/year2024/row_parser_spec.rb
@@ -1246,6 +1246,32 @@ RSpec.describe BulkUpload::Lettings::Year2024::RowParser do
           expect(parser.errors[:field_111]).to be_present
         end
       end
+
+      context "when some reasonable preference options are seleceted" do
+        let(:attributes) { setup_section_params.merge({ bulk_upload:, field_106: "1", field_107: "1", field_108: nil, field_109: "1", field_110: nil, field_111: nil }) }
+
+        it "sets the rest of the options to 0" do
+          parser.valid?
+          expect(parser.log.rp_homeless).to eq(1)
+          expect(parser.log.rp_insan_unsat).to eq(0)
+          expect(parser.log.rp_medwel).to eq(1)
+          expect(parser.log.rp_hardship).to eq(0)
+          expect(parser.log.rp_dontknow).to eq(0)
+        end
+      end
+
+      context "when some reasonable preference options are seleceted but reasonpref is No" do
+        let(:attributes) { setup_section_params.merge({ bulk_upload:, field_106: "2", field_107: "1", field_108: nil, field_109: "1", field_110: nil, field_111: nil }) }
+
+        it "sets the options to nil" do
+          parser.valid?
+          expect(parser.log.rp_homeless).to be_nil
+          expect(parser.log.rp_insan_unsat).to be_nil
+          expect(parser.log.rp_medwel).to be_nil
+          expect(parser.log.rp_hardship).to be_nil
+          expect(parser.log.rp_dontknow).to be_nil
+        end
+      end
     end
 
     describe "#field_116" do # referral
@@ -2484,6 +2510,42 @@ RSpec.describe BulkUpload::Lettings::Year2024::RowParser do
           end
         end
       end
+
+      context "when some illness type values are seleceted" do
+        let(:attributes) { setup_section_params.merge({ bulk_upload:, field_85: "1", field_94: "1", field_87: "1" }) }
+
+        it "sets the rest of the values to 0" do
+          parser.valid?
+          expect(parser.log.illness_type_1).to eq(1)
+          expect(parser.log.illness_type_2).to eq(0)
+          expect(parser.log.illness_type_3).to eq(0)
+          expect(parser.log.illness_type_4).to eq(0)
+          expect(parser.log.illness_type_5).to eq(1)
+          expect(parser.log.illness_type_6).to eq(0)
+          expect(parser.log.illness_type_7).to eq(0)
+          expect(parser.log.illness_type_8).to eq(0)
+          expect(parser.log.illness_type_9).to eq(0)
+          expect(parser.log.illness_type_10).to eq(0)
+        end
+      end
+
+      context "when none of the illness type values are seleceted" do
+        let(:attributes) { setup_section_params.merge({ bulk_upload:, field_85: "1" }) }
+
+        it "sets the values to nil" do
+          parser.valid?
+          expect(parser.log.illness_type_1).to be_nil
+          expect(parser.log.illness_type_2).to be_nil
+          expect(parser.log.illness_type_3).to be_nil
+          expect(parser.log.illness_type_4).to be_nil
+          expect(parser.log.illness_type_5).to be_nil
+          expect(parser.log.illness_type_6).to be_nil
+          expect(parser.log.illness_type_7).to be_nil
+          expect(parser.log.illness_type_8).to be_nil
+          expect(parser.log.illness_type_9).to be_nil
+          expect(parser.log.illness_type_10).to be_nil
+        end
+      end
     end
 
     describe "#irproduct_other" do