Modération - Handle quand une personne mute par spam quitte le serveur

Traceback (most recent call last):
File "C:\Users\Matth\AppData\Local\Programs\Python\Python310\lib\site-packages\discord\ext\tasks\__init__.py", line 239, in _loop
await self.coro(*args, **kwargs)
File "D:\.Projects\ADEPT\adeptbot\bot\tasks.py", line 54, in process_mutes
await delete_task(task.member, task.type)
File "D:\.Projects\ADEPT\adeptbot\bot\tasks.py", line 37, in delete_task
await util.unmute(member, reason)
File "D:\.Projects\ADEPT\adeptbot\bot\util.py", line 63, in unmute
await member.remove_roles(mute_role, reason=reason)
File "C:\Users\Matth\AppData\Local\Programs\Python\Python310\lib\site-packages\discord\member.py", line 1059, in remove_roles
await req(guild_id, user_id, role.id, reason=reason)
File "C:\Users\Matth\AppData\Local\Programs\Python\Python310\lib\site-packages\discord\http.py", line 740, in request
raise NotFound(response, data)
discord.errors.NotFound: 404 Not Found (error code: 10007): Unknown Member