I have a business scenario , I need update some fields in billing document or debit memo request via api, However, now, the debit memo request whose type is DMR1 cannot be modified through the interface https://api.sap.com/api/API_DEBIT_MEMO_REQUEST_SRV/resource
I did not find the interface to modify the billing document. I need update field MatlAccountAssignmentGroup、BillingDocumentDate and add pricing element ConditionType(PMP0) for billing document or debit memo request via api. There is no interface modification now. It is now only can to add a pricing element ContiionType(PMP0) when creating a debit memo request with reference to the billing document.
Please give me some advice. Thanks.