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`='7f931b34745fc625e8e1e04bb0fac5b0',`time`=1711711014,`ip`=X'2cc81baf',`location`='/newreply.php?tid=239&replyto=1421',`useragent`='claudebot',`location1`=0,`location2`=0,`nopermission`=0