phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './tripleac_Forum/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 ('4c95100ac5b1615eec3f73e042dae525', -1, 1462362316, 1462362316, '6b1448bc', 20, 0, 0)

Line : 187
File : sessions.php