SQL info: MySQL Query Error

Time: 2008-11-23 11:03pm
Script: /tour/manager_hotel.php

SQL: INSERT INTO t_session (sid,uid,islogin,isadmin, updated, sessiondata ) VALUES ('57933c','','','', '1227452613', 'a:0:{}')
Error: Duplicate entry '57933c' for key 1
Errno.: 1062