Update app.py

app.py

@@ -31,9 +31,11 @@ message_history.append(input)
 
 with placeholder.container():
     if message_history[-1] != "":
-        message(message_history[-1]) # display the latest message
+    
+        message(message_history[-1], key = "2nd_message") # display the latest message
+        
     else:
-        message(message_history[-2])
+        message(message_history[-2], key = "first_message")
         
 
 message(input, is_user=True)  # align's the message to the right