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 ('88102521fd65ddfe2f4a9a3367cf1afa', -1, 1412158328, 1412158328, '36cdfd84', 18, 0, 0)

Line : 191
File : sessions.php