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`='6ea397f034fe7feffd5943b8db789599',`time`=1711615676,`ip`=X'36a33e2a',`location`='/showthread.php?tid=513&action=lastpost',`useragent`='claudebot',`location1`=7,`location2`=513,`nopermission`=0