2825462 - Not all fields accepted via API

You are posting goods receipts via API_MATERIAL_DOCUMENT_SRV. You want to pass the 'CreatedByUser' field. 
The posting fails with error 'Field 'CreatedByUser' cannot be set for this operation on header level' (MM_IM_ODATA_API_MDOC/001)

SAP S/4HANA Cloud

1. Post a Goods Receipt via API_MATERIAL_DOCUMENT_SRV.
2. In the header of the payload pass a value in the field 'CreatedByUser'.
3. Posting fails with error 'Field CreatedByUser cannot be set for this operation on header level'  

The 'CreatedByUser' field is not a supported field within the API, up to and including Cloud version CE2308.

Until release CE2402, these are the listed header and item forbidden fields.

The following fields are not yet supported at the Header Level:

'CreatedByUser'
'CreationDate'
'CreationTime'
'MaterialDocument'
'MaterialDocumentYear'
'InventoryTransactionType'

The following fields are not yet supported at the Item Level:

'MaterialDocument'
'MaterialDocumentYear'
'MaterialDocumentItem'
'InventoryStockType'
'ControllingArea'
'FiscalYear'
'FiscalYearPeriod'
'FiscalYearVariant'
'IssuingOrReceivingStockType'
'IssgOrRcvgSpclStockInd'
'GoodsMovementIsCancelled'
'QuantityInBaseUnit'
'MaterialBaseUnit'
'CompanyCodeCurrency'
'IsAutomaticallyCreated'
'ReversedMaterialDocumentYear'
'ReversedMaterialDocument'
'ReversedMaterialDocumentItem'
'SlsPrcAmtInclVATInCoCodeCrcy'
'SpecialStockIdfgWBSElement'
'InventoryValuationType'
'AccountAssignmentCategory'
'FunctionalArea'
'HierarchyNodeLevel'

API Create Material Document  : here it lists the fields which are relevant for the Create or Post.

API_MATERIAL_DOCUMENT_SRV, CL_API_MATERIAL_DOCUME_DPC_EXT, LS_HEADER_FORBIDDEN, forbidden field, MM_IM_ODATA_API_MDOC001, MM_IM_ODATA_API_MDOC/002, Blocked Stock SE24, check_forbidden_item_fields. API_MATERIAL_DOCUMENT_SRV/resource/A_MaterialDocumentHeader' , KBA , MM-IM-GF-BAPI , BAPIs for Goods Movements , MM-IM-GF-BAPI-2CL , BAPIs for Goods Movements (Public Cloud) , Problem