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`='36e80e69e5bb3c1645550b0a8814554d',`time`=1711620586,`ip`=X'03ef3957',`location`='/showthread.php?tid=3768',`useragent`='claudebot',`location1`=2,`location2`=3768,`nopermission`=0