diff --git a/websdk2/model_utils.py b/websdk2/model_utils.py
index db1a243..fb52a47 100644
--- a/websdk2/model_utils.py
+++ b/websdk2/model_utils.py
@@ -99,8 +99,7 @@ def prepare(self):
 
     @staticmethod
     def del_data(data) -> dict:
-        keys_to_remove = ['_index', '_rowKey']
-        for key in keys_to_remove:
+        for key in ['_index', '_rowKey', 'update_time']:
             data.pop(key, None)
         return data