MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
144 - Table './noob_mybb/mybb_mailerrors' is marked as crashed and last (automatic?) repair failed
Query:
INSERT INTO mybb_mailerrors (`subject`,`message`,`toaddress`,`fromaddress`,`dateline`,`error`,`smtperror`,`smtpcode`) VALUES ('New Thread in Guides and Walkthroughs','LmazSidway,\n\nFletaClatt has just started a new thread in Guides and Walkthroughs. This is a forum you have subscribed to at Forums.\n\nThe thread is titled Just want to say Hi.\n\nHere is an excerpt of the message:\n--\nHello to every one, it\'s actually a fastidious for me to pay a visit this website, it contains price... (visit the thread to read more..)\n--\n\nTo view the thread, you can go to the following URL:\nhttp://friendlyfire.org.uk/forum/showthread.php?tid=441520\n\nThere may also be other new threads and replies but you will not receive anymore notifications until you visit the board again.\n\nThank you,\nForums Staff\n\n------------------------------------------\nUnsubscription Information:\n\nIf you would not like to receive any more notifications of new threads in this forum, visit the following URL in your browser:\nhttp://friendlyfire.org.uk/forum/usercp2.php?action=removesubscription&type=forum&fid=2&my_post_key=f438ac465dccb49c4edd94741009eb0b\n\n------------------------------------------','viswebw4ali@aol.com','\"Forums\" <andy@phlipside.co.uk>','1537762491','MyBB was unable to send the email using the PHP mail() function.','','0')