phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './anavasis/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 ('6eae788eb4fe7ec6a453797e1b5e2d24', -1, 1371668781, 1371668781, '6b140741', 0, 0, 0)

Line : 172
File : sessions.php