diff --git a/pymilvus/client/prepare.py b/pymilvus/client/prepare.py
index 6bc1c0823..1bc3b7183 100644
--- a/pymilvus/client/prepare.py
+++ b/pymilvus/client/prepare.py
@@ -606,7 +606,7 @@ def row_insert_param(
         entities: List,
         partition_name: str,
         fields_info: Dict,
-        schema_timestamp: int,
+        schema_timestamp: int = 0,
         enable_dynamic: bool = False,
     ):
         if not fields_info: