diff --git a/api/core/rag/datasource/vdb/vector_base.py b/api/core/rag/datasource/vdb/vector_base.py
index 1a0dc7f48b..22e191340d 100644
--- a/api/core/rag/datasource/vdb/vector_base.py
+++ b/api/core/rag/datasource/vdb/vector_base.py
@@ -45,6 +45,7 @@ class BaseVector(ABC):
     def search_by_full_text(self, query: str, **kwargs: Any) -> list[Document]:
         raise NotImplementedError
 
+    @abstractmethod
     def delete(self) -> None:
         raise NotImplementedError