phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './mopo_phpbb1/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 ('709cc3c64a7ce45c67ebbcaa60c2a3cd', -1, 1412158245, 1412158245, '36cdfd84', 6, 0, 0)

Line : 191
File : sessions.php