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`='18cd3cb9b8268cf9d5925f9c7d19bf0b',`time`=1711724024,`ip`=X'36c69aea',`location`='/showthread.php?tid=28146',`useragent`='claudebot',`location1`=2,`location2`=28146,`nopermission`=0