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 ('2c9f8c221632f6fb7ef514c02eb4fd0a', -1, 1469286795, 1469286795, '3692107d', -1, 0, 0)

Line : 187
File : sessions.php