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`='6816887ba61a149b27a19b38d8be73d4',`time`=1711617212,`ip`=X'2cccda4f',`location`='/showthread.php?tid=2668',`useragent`='claudebot',`location1`=2,`location2`=2668,`nopermission`=0