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`='4bf4c7b080364346507776bd6eb04120',`time`=1711660414,`ip`=X'345bffe1',`location`='/showthread.php?tid=3313&pid=10390',`useragent`='claudebot',`location1`=2,`location2`=3313,`nopermission`=0