MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
144 - Table './sql15202/mybb_posts' is marked as crashed and last (automatic?) repair failed
Query:
SELECT pid, tid FROM mybb_posts WHERE pid IN(368042,368041,368040,368039,368038,368037,368036,368035) AND visible=1 ORDER BY dateline DESC