Internal Server Error

Unable to execute INSERT statement. [wrapped: Could not execute update [Native Error: Table './maarefqo_article/visitor' is marked as crashed and should be repaired] [User Info: INSERT INTO visitor (VISITEDATE,USERID,IP,PAGEVIEW,CATEGORYID,CASEID) VALUES ('2015-09-05 16:42:32',0,'','articleList',452,0)]]

An internal error occurred while the Web server was handling your request. Please contact the webmaster to report this problem.

Thank you.

2015-09-05 16:42