Update Supplier Order in existing Purchase Orders through REST API/ FBDI

Summary:

Can we update Supplier Order in an Open Purchase Order, we are not able to update it manually but business has a requirement to update this field either manually or through API?

The use case is that sometimes modifications by supplier (order number change/version number) and business wants the changes to be tracked in the Supplier Order field, also there are some user errors in entering the correct order number.

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