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`='d1f2b8c3b92e325b0f567220854eca3a',`time`=1711712678,`ip`=X'36e06466',`location`='/showthread.php?tid=28209',`useragent`='claudebot',`location1`=2,`location2`=28209,`nopermission`=0