MyBB Community Forums

I just tried to go to my forum and I got the following warning:

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
145 - Table './gggworld_forum/mybb_sessions' is marked as crashed and should be repaired
Query:
DELETE FROM mybb_sessions WHERE uid='2'

The forum is located at:

http://www.ggg-world.net/forum/

The back-end is still accesable. I am not entirely sure why this happened all of a sudden and what to do about it.

I am currently running version 1.6.9

Can anyone shed some light on this?

See: http://community.mybb.com/thread-105849-...#pid771860

Should I use:

REPAIR TABLE mybb_sessions

or:

repair table mybb_sessions

so with or without quotes?

It makes no difference.