Use
Functional location labels can be changed. The system saves all previously used labels as historical labels. To avoid confusion, you cannot reuse a historical label.
However, if you need to use the historical label you must explicitly release it for reuse.
Prerequisites
Activate the function Alternative Labeling of Functional Locations in Customizing for Plant Maintenance (PM) under Functional Locations.
Procedure
Choose Continue and save the changes made to the master record.