Update app.py

app.py

@@ -58,7 +58,7 @@ async def setup_endpoint(kb_file: UploadFile = File(...)):
         raise HTTPException(status_code=400, detail="Invalid KB format, missing 'knowledge_base' key")
 
     # Clear existing entries before adding new KB
-    kb_collection.delete(where={})  # Delete all previous entries
+    kb_collection.delete(where={"id": {"$ne": None}})  # Delete all previous entries
 
     # Add KB entries
     for entry in kb_data["knowledge_base"]: