Oracle Financials Cloud REST API - Update invoice line quantity/unit price

I'm unable to update the quantity and/or unit price of an existing line (not matched to a PO). I'm able to successfully update other line item fields such as Description or LineAmount, etc. I'm getting the below errors:

Quantity: Attribute Quantity in view object InvoiceHeaderEO_InvoiceLine2_InvoiceHeaderVOToInvoiceLineVO_InvoiceLineVO cannot be set.

Unit Price: Attribute UnitPrice in view object InvoiceHeaderEO_InvoiceLine2_InvoiceHeaderVOToInvoiceLineVO_InvoiceLineVO cannot be set.