Update app.py

app.py

@@ -172,7 +172,7 @@ with gr.Blocks(css=".chatbox {height: 400px; overflow-y: auto; border: 1px solid
           new_message_html += f"<img src='{ASSISTANT_PIC_PATH}' style='width: 40px; height: 40px; border-radius: 50%; margin-right: 10px;'>"
           new_message_html += f"{assistant_reply}</div><br>"
 
-          return gr.update(value=new_message_html, append=True), history, "", message
+          return gr.update(value=new_message_html), history, "", message
 
 
         def regenerate_response(history, last_message, max_tokens, top_p, temperature):