Purchase Order - Delivery Costs

Hi, I am at a new client and curious about where the DCGR delivery costs record is coming from in a stock transfer purchase order. I see this in the purchase order history with a value under condition ZFR1, Issue is I cannot see any condition records for ZFR1 yet a line with a value in the purchase order history. Is there a place I can see the config for this or where this value might be coming from?