Email functionality and forum updates

[Jimothy]

Currently trying to change my username to Spiritar, but funnily enough can't remember my password (Just got it saved in chrome, hence logged in). Long story short, I've emptied my messages as Ursus suggested as best I can, but get this message when trying to check the 'Sent Items' folder (same as KAWISH-ALI):

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
1054 - Unknown column 'Guest' in 'where clause'
Query:
SELECT uid, username, usergroup, displaygroup FROM mybb_dgc_users WHERE uid IN (Guest)

Despite that, when trying to get the password email sent, (be it with my password in, or a link to reset it, I'm not sure) I recieve nothing. Checked spam etc, waited for, well, I fell asleep and it's been about six hours now, and I've tried again a few times, but no luck. So... um... yeah, what can I do about this?

Edit: Sorry, I misread the last few posts and thought the email had been fixed and I just wound up with some bad luck, so, my apologies here, I'll wait patiently.

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I was formerly know as Spiritar.

It's been a while.