Viewing Planning Unit Hierarchy Usage
Planning unit hierarchies might have dependencies such as scenario and version assignments or data validation rules which are defined in forms. If dependencies exist for a planning unit hierarchy, the hierarchy cannot be deleted until the dependencies are removed. The Usage tab enables you to view planning unit hierarchy dependencies and links you to the forms or scenario and version assignments so you can remove the dependencies, if needed.
To view planning unit hierarchy usage:
Once all dependencies are removed from a planning unit hierarchy, you can delete the hierarchy. See Deleting and Renaming Planning Unit Hierarchies.