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`='af4e595d5d2c8486fe31ef7642eb5bf1',`time`=1711652655,`ip`=X'03ee571f',`location`='/showthread.php?tid=3906',`useragent`='claudebot',`location1`=2,`location2`=3906,`nopermission`=0