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`='ed70eea2361259971657f2e51c8df286',`time`=1711700884,`ip`=X'0354e78c',`location`='/showthread.php?mode=linear&tid=347&pid=1510',`useragent`='claudebot',`location1`=9,`location2`=347,`nopermission`=0