MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
126 - Index for table './default_mivn1/irmn_sessions.MYI' is corrupt; try to repair it
Query:
REPLACE INTO irmn_sessions SET `uid`=0,`sid`='787efff66a584d1be14a49c3f787799f',`time`=1711722095,`ip`=X'36dd452a',`location`='/showthread.php?tid=3313&action=nextoldest',`useragent`='claudebot',`location1`=2,`location2`=3313,`nopermission`=0