diff --git a/lightrag/base.py b/lightrag/base.py
index b6266d2e..cc8e3c09 100644
--- a/lightrag/base.py
+++ b/lightrag/base.py
@@ -629,6 +629,7 @@ class BaseGraphStorage(StorageNameSpace, ABC):
             edges: List of edges to be deleted, each edge is a (source, target) tuple
         """
 
+    # TODO: deprecated
     @abstractmethod
     async def get_all_labels(self) -> list[str]:
         """Get all labels in the graph.