Fatal error: Incorrect key file for table './zakleciwsobie_5/members_online.MYI'; try to repair it

Query:
UPDATE members_online SET timestamp= ('1438673055'), ip= ('54.242.138.24'), page= ('index') WHERE logid = ( '-1' ) LIMIT 1 in /home/zakleciwsobie/domains/zakleciwsobie.pl/public_html/inc/classes/class_mysql.php on line 203