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`='54bb91a7dc8a3b340488490630de0f56',`time`=1711712471,`ip`=X'36e13829',`location`='/showthread.php?tid=493',`useragent`='claudebot',`location1`=29,`location2`=493,`nopermission`=0