diff --git a/csst_dfs_commons/models/facility.py b/csst_dfs_commons/models/facility.py
index 09dcf58baec4c829d3f2b8de494e3479657a721b..69c8c557d1fcdfd24f4776e1d4e05ba81a5bdd24 100644
--- a/csst_dfs_commons/models/facility.py
+++ b/csst_dfs_commons/models/facility.py
@@ -156,6 +156,7 @@ class Level1Record(BaseModel):
     pipeline_id: str=""
     detector_no: str=""
     pmapname: str=""
+    build_id: int=0
     header: Dict[str,object] = default_field({})
     refs: Dict[str,str] = default_field({})