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`='538ea245e397f7997394f78bee04cf10',`time`=1711620100,`ip`=X'12d466ae',`location`='/newreply.php?tid=245&replyto=1478',`useragent`='claudebot',`location1`=0,`location2`=0,`nopermission`=0