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`='f55ef2f0047b7eed96b88f7c9d874968',`time`=1711696501,`ip`=X'0353bb24',`location`='/showthread.php?tid=533',`useragent`='claudebot',`location1`=5,`location2`=533,`nopermission`=0