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 ('9cf988940198d8f3e74cf54ebc5fef1d', -1, 1485102985, 1485102985, 'ae814e49', 5, 0, 0)

Line : 187
File : sessions.php