Invoice imported from Payables Agent does not allow validation due to no Requester

Summary:

We are currently doing SIT with our Payables Agent and we have encountered an error specifically for all PO-based invoices.

When we are sending the invoice document to the Payables Agent, and imported it to Payables, our PO-based invoices get created as 'incomplete' per our configuration.

Previously when imported, most of the fields are greyed-out and cannot be edited for the invoice lines, and there is no need to add a requester name as it is not a required field. This has been working prior to 26C upgrade in lower instance.

Now, however, it is throwing an error when validating the PO-based Invoice: You must provide a value for the Requester attribute.