We have business scenario to add a custom field into Picking and Receiving order line. But no extensionProperties in the entities interface IPickingAndReceivingOrderLine. Please add extensionProperties into the interface IPickingAndReceivingOrderLine. Noted: We can extends only Picking & Receiving Order Header because having extensionProperties in the interface IPickingAndReceivingOrder but not in IPickingAndReceivingOrderLine. However, in CRT can add extension fields into CommerceProperty TransferOrder and TransferOrderLine, but in POS interface, no extensionProperties in IPickingAndReceivingOrderLine only.