Fixed unexpected behavior

cogs/custom_channels.py

@@ -1,4 +1,5 @@
 from discord import ApplicationContext, Embed, option
+from discord.abc import GuildChannel
 from discord import utils as ds_utils
 from discord.commands import SlashCommandGroup
 from discord.ext import commands
@@ -7,12 +8,18 @@ from classes.holo_user import HoloUser
 from enums.colors import Color
 from modules.utils import config_get
 from modules.utils_sync import config_get_sync, guild_name
+from modules.database import col_users
 
 
 class CustomChannels(commands.Cog):
     def __init__(self, client):
         self.client = client
 
+    @commands.Cog.listener()
+    async def on_guild_channel_delete(self, channel: GuildChannel):
+        col_users.find_one_and_update({"customchannel": channel.id}, {"$set": {"customchannel": None}})
+
+
     customchannel = SlashCommandGroup("customchannel", "Керування особистим каналом")
 
     @customchannel.command(