Too many matching records error in Visual Builder Add-in for Excel

Summary:
The requisition upload by Visual Builder Add-in for Excel ended in success but with a warning that there're too many matching records found.

I've checked each master data and value set values if there're any duplicated entries of each fields (e.g. supplier, category, deliver-to location etc) , but there aren't.

Do you have any idea why this warning occurs?

(The PR is available on the UI, but we'd like to know the cause and how to solve this warning.)