How to create "Customer ownership change" and "Supplier ownership change" event separately

Summary:

Hi,

We are trying to test dropship with Global Procurement Flow, we setup Supplier Ownership Change Event as "AP Invoice Match" in Drop Ship Financial Flow, and Drop Ship Supplier Ownership Change Event as "ASN from supplier", hoping that and "Customer ownership change" and "Supplier ownership change" will be created separately when we creating ASN and matching invoice with PO, but those two route type are always created together, is there any other way to achieve this? Thanks in advance!

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