phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpBB/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 ('12fa96fbdf9d16956b35b9558844a23d', -1, 1493599838, 1493599838, '36514708', 8, 0, 0)

Line : 187
File : sessions.php