IDR - PO number field in invoice header is locked for editing

Summary:

When invoices is scanned using IDR, the PO number is locked for editing even though the invoice status is "Incomplete".

When this happens, we cancel the invoice and manually enter it, in the system by using "Create invoice". This workaround is very time consuming.

Sometimes the issue is that the supplier site on the PO is not the same as on the invoice site.

How can we make the PO field in the invoice header editable?

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Version (include the version you are using, if applicable):

23D

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