phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './twisty_phpb1/phpbb_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('be79aee69cb3bdc3f71bb11f76ae1b79', -1, 1513629551, 1513629551, '36eaf776', 4, 0, 0)

Line : 187
File : sessions.php