MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
145 - Table './balkania_forum/mybb_sessions' is marked as crashed and should be repaired
Query:
REPLACE INTO mybb_sessions SET `uid`=0,`sid`='eaba0dc3500daf2884069e184494915e',`time`=1711711955,`ip`=X'03ed0501',`location`='/newreply.php?tid=239&replyto=478',`useragent`='claudebot',`location1`=0,`location2`=0,`nopermission`=0