You can delete a planning unit hierarchy if it is not referenced by other Planning objects such as data validation rules or scenario and version assignments. The Usage tab displays objects that reference the selected planning unit hierarchy and links you to the objects so you can disassociate them from the hierarchy.
You can also change the name of a planning unit hierarchy. Renaming a planning unit hierarchy does not affect Planning objects that reference the hierarchy.
To delete or rename planning unit hierarchies:
Select Administration, then Approvals, and then Planning Unit Hierarchy.
To delete, select the planning unit hierarchy to delete, and then click Delete.
To rename, select the planning unit hierarchy to rename, and then click Rename. Enter the new name for the planning unit hierarchy in the dialog box.
If you select a planning unit hierarchy that is referenced by other Planning objects, an error message is displayed. See Viewing Planning Unit Hierarchy Usage to view and edit the Planning objects that reference the planning unit hierarchy.