feat: don't add empty assignments in field_mapping_for_errors

app/services/bulk_upload/lettings/year2023/row_parser.rb

@@ -893,10 +893,10 @@ private
       owning_organisation_id: [:field_1],
       managing_organisation_id: [:field_2],
       renewal: [:field_6],
-      scheme_id: [scheme_field],
-      scheme: [scheme_field],
-      location_id: [location_field],
-      location: [location_field],
+      scheme_id: (scheme_field.present? ? [scheme_field] : nil),
+      scheme: (scheme_field.present? ? [scheme_field] : nil),
+      location_id: (location_field.present? ? [location_field] : nil),
+      location: (location_field.present? ? [location_field] : nil),
       created_by: [:field_3],
       needstype: [:field_4],
       rent_type: %i[field_5 field_10 field_11],
@@ -1040,7 +1040,7 @@ private
       address_line2: [:field_20],
       town_or_city: [:field_21],
       county: [:field_22],
-    }
+    }.compact
   end
 
   def attribute_set

config/locales/en.yml

@@ -353,7 +353,7 @@ en:
     financial:
       tshortfall:
         outstanding_amount_not_expected: "You cannot answer the outstanding amount question if you don’t have outstanding rent or charges"
-        more_than_rent: "Enter a value less less than the basic rent amount"
+        more_than_rent: "Enter a value less than the basic rent amount"
         must_be_positive: "Enter a value over £0.01 as you told us there is an outstanding amount"
       hbrentshortfall:
         outstanding_amount_not_expected: "Answer must be ‘yes’ as you have answered the outstanding amount question"