phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './mw_phpbb/phpbb_mw_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_mw_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('769a0be0a9aa7214ecc45a5c00167b23', -1, 1369476283, 1369476283, '6b15ba26', 5, 0, 0)

Line : 187
File : sessions.php