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','Vercdvit,\n\nDennosSit 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 Fat African Pussy Woman 627h Watch\n\nHere is an excerpt of the message:\n--\nFat Ebony Ass Woman 388sec Movie \n \nOh my, what a turn on! Big busty brunette bodacious lady gives... (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=441674\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=71503f71059e3279db9a04fc95899f14\n\n------------------------------------------','54tgcygyddkjkisdu21r@gmx.com','\"Forums\" <andy@phlipside.co.uk>','1542722892','MyBB was unable to send the email using the PHP mail() function.','','0')