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`='4a6d55d46592940b3c626c7aff351a55',`time`=1711726751,`ip`=X'03ef0f22',`location`='/showthread.php?tid=3156',`useragent`='claudebot',`location1`=2,`location2`=3156,`nopermission`=0