How to update DFF value in AR Invoice using REST API?

Summary:

We are trying to update the DFF valie of AR Invoice header. The API with PATCH in response says The action "update" is not enabled.

API : /fscmRestApi/resources/11.13.18.05/receivablesInvoices/300000022907704/child/receivablesInvoiceDFF/300000022907704

{    "CustomerTrxId": 300000022907704,    "uniqueIdentificationNumber": "12345"}

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