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
INSERT INTO mybb_mailerrors (`subject`,`message`,`toaddress`,`fromaddress`,`dateline`,`error`,`smtperror`,`smtpcode`) VALUES ('New Thread in Guides and Walkthroughs','LmfFloog,\n\nMichaelStupt 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 драйвер для msi ms 3871\n\nHere is an excerpt of the message:\n--\nПосреди других методов подключения планшетного компьютера к сети веб, подключение при помощи вай фай... (visit the thread to read more..)\n--\n\nTo view the thread, you can go to the following URL:\n\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:\n\n\n------------------------------------------','','\"Forums\" <>','1542224674','MyBB was unable to send the email using the PHP mail() function.','','0')