phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './kidnem998/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 ('4871e21bcf7b39a24a55beb1bbfb6254', -1, 1461986461, 1461986461, '36e216c0', -1, 0, 0)

Line : 187
File : sessions.php