diff --git a/dbgpt/serve/rag/api/schemas.py b/dbgpt/serve/rag/api/schemas.py
index e94819a5f..ed9f8122c 100644
--- a/dbgpt/serve/rag/api/schemas.py
+++ b/dbgpt/serve/rag/api/schemas.py
@@ -15,7 +15,7 @@ class SpaceServeRequest(BaseModel):
     id: Optional[int] = Field(None, description="The space id")
     name: str = Field(None, description="The space name")
     """vector_type: vector type"""
-    vector_type: str = Field("Chroma", description="The vector type")
+    vector_type: str = Field(None, description="The vector type")
     """desc: description"""
     desc: Optional[str] = Field(None, description="The description")
     """owner: owner"""