diff --git a/lazyllm/tools/rag/milvus_store.py b/lazyllm/tools/rag/milvus_store.py
index 5a4ab571..eec82763 100644
--- a/lazyllm/tools/rag/milvus_store.py
+++ b/lazyllm/tools/rag/milvus_store.py
@@ -299,7 +299,6 @@ def _deserialize_node_partial(self, result: Dict) -> DocNode:
             if k.startswith(self._embedding_key_prefix):
                 doc.embedding[k[len(self._embedding_key_prefix):]] = v
             elif k.startswith(self._global_metadata_key_prefix):
-                if doc.parent:
-                    doc._global_metadata[k[len(self._global_metadata_key_prefix):]] = v
+                doc.global_metadata[k[len(self._global_metadata_key_prefix):]] = v
 
         return doc