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`='467b951314278664d7cf5cd6c7b531b6',`time`=1711706825,`ip`=X'345aeb5b',`location`='/showthread.php?tid=4291',`useragent`='claudebot',`location1`=2,`location2`=4291,`nopermission`=0