Site master - customer XXX not maintained

Hi,

Previously, when I save the site master with transport request problem. So only part of the site master is save. But after apply the note in system. This problem is solved.

However, due to previous problem, when I using WB02 to change site master 0002, error message "customer 0002 is not maintained" But I cannot create new site with "0002". pls advice how can I solve this problem

Thanks

Jo