diff --git a/app/services/bulk_upload/lettings/year2024/row_parser.rb b/app/services/bulk_upload/lettings/year2024/row_parser.rb
index 34c584670..588a92255 100644
--- a/app/services/bulk_upload/lettings/year2024/row_parser.rb
+++ b/app/services/bulk_upload/lettings/year2024/row_parser.rb
@@ -1495,7 +1495,7 @@ private
   end
 
   def valid_nationality_options
-    %w[0 826] + GlobalConstants::COUNTRIES_ANSWER_OPTIONS.keys
+    %w[0] + GlobalConstants::COUNTRIES_ANSWER_OPTIONS.keys # 0 is "Prefers not to say"
   end
 
   def nationality_group(nationality_value)
diff --git a/app/services/bulk_upload/sales/year2024/row_parser.rb b/app/services/bulk_upload/sales/year2024/row_parser.rb
index 84f9dba2e..70aaee49a 100644
--- a/app/services/bulk_upload/sales/year2024/row_parser.rb
+++ b/app/services/bulk_upload/sales/year2024/row_parser.rb
@@ -1357,6 +1357,6 @@ private
   end
 
   def valid_nationality_options
-    %w[0 826] + GlobalConstants::COUNTRIES_ANSWER_OPTIONS.keys
+    %w[0] + GlobalConstants::COUNTRIES_ANSWER_OPTIONS.keys # 0 is "Prefers not to say"
   end
 end