If you use the YKALCSVC command in Business Continuity Manager 8.5.1 or later to overwrite a user SVC by using the already-assigned SVC number, you do not need to delete the user SVC. To assign another SVC number, or when using the YKALCSVC command for Business Continuity Manager versions earlier than 8.5.1, delete the user SVC, and then re-register the user SVC.