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 ('6e4a6393ba7a11856c333c41cd60cb15', -1, 1398322389, 1398322389, '365385bd', -1, 0, 0)

Line : 187
File : sessions.php