Added a check to make sure the reply message is sent in an existing channel.

cogs/custom_channels.py

@@ -196,6 +196,7 @@ class CustomChannels(commands.Cog):
 
         await holo_user_ctx.set("customchannel", None)
 
+        if ctx.channel_id != custom_channel.id:
             await ctx.respond(
                 embed=Embed(
                     title="Канал знищено",