How to avoid source agreement defaulting on PO Line when there are two CPA's with the same supplier

Summary:

Avoid defaulting of Source Agreement on PO Line when there are two CPA's with same supplier

Content (required):

When the Buyer creates a PO, source agreement (CPA) is defaulted to the latest one when there are two CPA's with the supplier. It is okay if there is only one CPA but users want to have it to default to blank when there are multiple and should be able to search and select the appropriate one. Currently this is causing an issue in submitting the PO with wrong source agreement (defaulted).

Any thoughts on this?

Version (include the version you are using, if applicable): 21D