phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './vrforum/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 ('7af439ce8b7afc3d0cf43749f15e2eb5', -1, 1397899547, 1397899547, 'ae8150a6', -1, 0, 0)

Line : 187
File : sessions.php