diff --git a/apiserver/paasng/paas_wl/bk_app/cnative/specs/models/app_resource.py b/apiserver/paasng/paas_wl/bk_app/cnative/specs/models/app_resource.py
index 36b5dd0ce2..79ec0d1ac1 100644
--- a/apiserver/paasng/paas_wl/bk_app/cnative/specs/models/app_resource.py
+++ b/apiserver/paasng/paas_wl/bk_app/cnative/specs/models/app_resource.py
@@ -242,8 +242,11 @@ def update_app_resource(app: Application, module: Module, payload: Dict):
     :raise: `ValidationError` when payload is invalid
     :raise: `ValueError` if model resource has not been initialized for given application
     """
-    # force replace metadata.name with app_code to avoid user modify
-    payload["metadata"]["name"] = generate_bkapp_name(module)
+    try:
+        # force replace metadata.name with app_code to avoid user modify
+        payload["metadata"]["name"] = generate_bkapp_name(module)
+    except KeyError as e:
+        raise ValidationError(f"Missing field in manifest: {e}")
 
     try:
         obj = BkAppResource(**payload)