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 ('1a3ad83d4d5eac757a5bf64247e01868', -1, 1461938141, 1461938141, '36dd22e0', 0, 0, 0)

Line : 189
File : sessions.php