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`='91f93423991fcf5382a085062a8201c6',`time`=1711709571,`ip`=X'2cde3f43',`location`='/newreply.php?tid=245&replyto=1471',`useragent`='claudebot',`location1`=0,`location2`=0,`nopermission`=0