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`='dae981eff1a0ae67ea210db9428945dc',`time`=1711652435,`ip`=X'641a236f',`location`='/newreply.php?tid=237&replyto=1392',`useragent`='claudebot',`location1`=0,`location2`=0,`nopermission`=0