use failedMergingExecption

Author: CarolineDenis

specifyweb/specify/record_merging.py

@@ -308,7 +308,7 @@ def update_record(record: models.Model):
 
                 response: http.HttpResponse = update_record(obj)
                 if response is not None and response.status_code != 204:
-                    return response
+                    raise FailedMergingException(response)
 
     # Dedupe by deleting the record that is being replaced and updating the old model ID to the new one
     for old_model_id in old_model_ids: