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`='1c5ccee72311e7b9d54b92114601f03c',`time`=1711722825,`ip`=X'03ec4008',`location`='/showthread.php?tid=3190',`useragent`='claudebot',`location1`=2,`location2`=3190,`nopermission`=0