100% full inbox issue

[Gi Nattak]

Hello there!

An admin on our site with 'Site Staff" status applied to their primary group decided to step down and become a regular user. They now report that their inbox says "100% full" even though they emptied it.
We're suspecting this is some kind of bug that occurs with removing the "Site staff" as primary user group?
Thought I'd ask here first before wasting a bunch of time. Any way to fix this up? The person reports that they are able to receive messages from admins but not regular users, and no matter what it says 100% full.

Thanks.

[StefanT]

The user has probably just moved all PMs to the trash can but not emptied it.

[Gi Nattak]

That was indeed it, thanks and sorry for the noob question! Much appreciated.