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`='0513feba18e0de7dbf1f25f846b71c61',`time`=1711700981,`ip`=X'035148f7',`location`='/showthread.php?tid=3641',`useragent`='claudebot',`location1`=2,`location2`=3641,`nopermission`=0