Update app.py

app.py

@@ -232,12 +232,7 @@ def build_qa_chain(collection_name, vector_db, file: str):
     """
     
     #vincent added to handle the tenant problem 20250211
-    #chromadb.api.client.SharedSystemClient.clear_system_cache()
-
-    vector_db = gr.State()
-    chain = gr.State()
-    collection_name = gr.State()    
-    
+    chromadb.api.client.SharedSystemClient.clear_system_cache()   
     new_client = chromadb.EphemeralClient()
     memory = ConversationBufferMemory(
         memory_key="chat_history",