bug: clan leave doesn't update to cache

[marcandreher]

Describe the bug

After leaving a joined clan, you can't create a new one without restarting the server. I checked the database, and it did update. I think that could be a cache problem

To Reproduce

Join a pre-existing clan.
Leave it.
Create a new clan.

Expected behavior

The clan was supposed to be created, but instead, it says you're already in a clan.

bancho.py Version

7efba5a

Python Version

3.11.X (Default)

Relevant log output

No response

Additional context

No response