Enhance error message for file validation

sage_validation/file_validator/forms.py

@@ -241,7 +241,7 @@ class CSVUploadForm(forms.Form):
                     errors.append(
                         f"Row {index}: The combination of '{cc_field}' ({cc}), "
                         f"'{dep_field}' ({dep}), and '{nominal_account_field}' "
-                        f"({nominal_account_name}) does not exist in MEO valid Sage accounts."
+                        f"({nc}) does not exist in MEO valid Sage accounts."
                     )
 
         return errors