fix

app.py

@@ -199,11 +199,10 @@ async def on_raw_message_delete(payload):
     try:    
         message_id = payload.message_id
         channel_id = payload.channel_id
-        
-        cached_message = message_cache.pop(message_id, None)
-        
-        if cached_message:
-            if cached_message.author == bot.user:
+        message = message_cache.pop(message_id, None)
+
+        if message:
+            if message.author == bot.user:
                 return
         
             embed = Embed(color=Color.red())