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`='bc4b50e8ab81f77dc84a517f74f28f4c',`time`=1711668956,`ip`=X'b84887d2',`location`='/newreply.php?tid=265&replyto=1663',`useragent`='claudebot',`location1`=0,`location2`=0,`nopermission`=0