General rules regarding object update (e.g. regions)

It has been established that after the initial transfer of certain objects (e.g. regions) from SAP ECC / S/4 to SAP FSM, these objects should be changed solely in SAP FSM (not in SAP). This is due to the need of a singular data source for asynchronous communication. If it’s possible to change an object in SAP FSM, it should be changed only there.