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 ('4d931abc8e993013a5f11c54c0a4fdde', -1, 1490435249, 1490435249, '3691d0a0', 41, 0, 0)

Line : 187
File : sessions.php