Update app.py

app.py

@@ -107,7 +107,8 @@ async def chat(request: ChatRequest):
                 ),
             )
 
-            # put back the unformatted user message
+            # delete the prompt and put back the unformatted user message
+            del request.chat_history[-1]
             request.chat_history.append({"role": "user", "parts": [{"text": request.message}]})
 
             return {"response": response.text, "dataset_str": concise_text_string, "history": request.chat_history, "RAG_prompt": rag_prompt, "chunks": chunks, "results": results}