Update app.py

app.py

@@ -143,6 +143,8 @@ async def on_chat_start():
         return_messages=True,
     )
 
+    memory.memory.clear()
+
     # Create a chain that uses the Chroma vector store
     chain = ConversationalRetrievalChain.from_llm(
         llm = llm_groq,