phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './messageboard/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 ('c24dda89299ad7a4c001d0b0b715eca0', -1, 1462221976, 1462221976, '36e35b48', 1, 0, 0)

Line : 187
File : sessions.php