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 ('a5cf0a16c821ce2085704b9e1127c78e', -1, 1472527263, 1472527263, '36e0959f', 40, 0, 0)

Line : 187
File : sessions.php