Errbit | fixing errors update

Author: snyaggarwal

core/common/mixins.py

@@ -938,7 +938,7 @@ def save_as_new_version(self, user, **kwargs):  # pylint: disable=too-many-branc
 
                 transaction.on_commit(lambda: self._index_on_new_version_creation(prev_latest))
         except ValidationError as err:
-            errors.update(get(err, 'message_dict') or get(err, 'error_dict'))
+            errors.update(get(err, 'message_dict') or get(err, 'error_dict') or {})
         finally:
             cls.resume_indexing()
             if not persisted: