diff --git a/app/services/bulk_upload/lettings/year2024/row_parser.rb b/app/services/bulk_upload/lettings/year2024/row_parser.rb
index 5b7a49339..af82fe6d4 100644
--- a/app/services/bulk_upload/lettings/year2024/row_parser.rb
+++ b/app/services/bulk_upload/lettings/year2024/row_parser.rb
@@ -755,6 +755,7 @@ private
       dont_know_selected = field_111 == 1
 
       if selected_reasons.positive? && dont_know_selected
+        block_log_creation!
         errors.add(:field_111, I18n.t("#{ERROR_BASE_KEY}.reasonpref.conflict"))
       end
     end