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 ('1a058c9a1f1b7c07f1fa6f8e53400683', -1, 1371721862, 1371721862, 'b849078f', -1, 0, 0)

Line : 187
File : sessions.php