3D Annotations belong to either the contents or the instance information of their owners, depending on the default 3D Annotation Owner setting. If you change this setting and then add a new dimension to an element having dimensions created under the other owner setting, Creo Elements/Direct Modeling warns you of this conflict of owners. However, you can suppress these messages if you want.

To suppress the owner conflict messages, clear the Warning on Owner Clash check box in the System Settings dialog box. To allow the messages to appear, click this option on.