Call to PO update API return asking to add ChangeOrderDescription attribute

Hi,

Call to /fscmRestApi/resources/11.13.18.05/draftPurchaseOrders/{draftPurchaseOrdersUniqID}/child/lines/{POLineId}/child/DFF/{PoLineId} returns "You must provide the ChangeOrderDescription attribute to create a change order on the approved purchase order. (PO-2055657)". The API documentation does not list ChangeOrderDescription in request body.

Adding ChangeOrderDescription to the request returns "Invalid attribute "ChangeOrderDescription" in the payload." If you could provide a sample request payload, it will be helpful.

Thank you for your help.