AttributeError: 'NoneType' object has no attribute '_voice_member_ids'

[sentry-io]

Sentry Issue: INQUIRY-T

AttributeError: 'NoneType' object has no attribute '_voice_member_ids'
  File "naff/client/smart_cache.py", line 753, in place_voice_state_data
    if user_id in old_state.channel._voice_member_ids:

Task exception was never retrieved
future: <Task finished name='Task-277434' coro=<GlobalCache.place_voice_state_data() done, defined at /usr/local/lib/python3.10/site-packages/naff/client/smart_cache.py:737> exception=AttributeError("'NoneType' object has no attribute '_voice_member_ids'")>