MySQL Error Occurred

Error Message:
126: Incorrect key file for table './simpleshop/CubeCart_sessions.MYI'; try to repair it

SQL:
INSERT INTO CubeCart_sessions (`sessId`,`timeStart`,`timeLast`,`customer_id`,`ip`,`browser`) VALUES ('715643b0520eef44a67bce70f53d4943','1416973799','1416973799',0,'54.87.138.122','CCBot/2.0 (http://commoncrawl.org/faq/)');