How to match legacy PO number with the Orcale PO (created through Drop ship SO via FBDI) in cloud?

Summary:

We are looking for inputs on the process of importing the Drop Ship Sales Orders through FBDI.

The only requirement is that, Purchase order number(Created from the drop ship sales order) should be retained as per the legacy Purchase Order number.

Kindly provide any input on this process.

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

Oracle Fusion Cloud

Code Snippet (add any code snippets that support your topic, if applicable):