Oracle Fusion ERP to Unifier - Invoice Integration issue - Remaining PO Line Amount

We are implementing Oracle Primavera Unifier, with an integration into our Oracle Fusion ERP system. Within ERP a match exception of less than 10% can be overridden without any impacts in ERP. When we attempt to import the invoice into Unifier via an integration it creates an issue because the invoice line amount exceeds teh remaining po line amount information.
We are looking at options to resolve this, and there doesn't appear to be a way to allow the invoice to be imported directly. The only option appears to be creating a workflow that can be used by the integration that will route these invoices for approval prior to completion.