When a stock item is redesigned and the original item is still usable, I need a feature to use up and replace the original item. In SAP this is called discontinuation data. In Acumatica, I have no process or control over using up and replacing items.
Follow-Up Material: Number of the material that the system uses in materials planning to replace the material to be discontinued once its warehouse stock is depleted. In the material master record and also in the bill of material (BOM), you can define a follow-up material for a material to be discontinued. The follow-up material defined in the BOM has a higher priority than that in the material master record.
https://blogs.sap.com/2014/03/12/concept-of-discontinuation-data-material-master-and-bom/