Sales orders stuck on awaiting Billing

Summary:

We have five sales order credit notes stuck on Awaiting Billing. They are showing in Billings/ Import Exceptions. Downloading the ManageAutoInvoiceLines.xlsx spreadsheets we learn that the error is "You don't have approval limits set up for refunds." Why is this error being reported. These credit notes are just credit notes with line type "Return for credit and return the item". They are not refunds.

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