Dependencies (CS-AG/PM-PRM-MP) 
When archiving data, you must consider dependencies between archiving objects, such as those between maintenance plans and pieces of equipment of category Production resources/tools (PRT equipment).
Therefore, before you archive maintenance plans, we recommend that you archive PRT equipment or eliminate existing links to PRT equipment.
Generally, you cannot archive data until dependent objects have been archived. For more information about the network graphic which shows the dependencies between archiving objects, see
The Network Graphic.