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`='db3b9529996016ec4104eb1437ca4cfa',`time`=1711653448,`ip`=X'2ccbdb75',`location`='/showthread.php?tid=3240',`useragent`='claudebot',`location1`=2,`location2`=3240,`nopermission`=0