R12 Payables: Vendor and vendor sites can be updated post merge

The My Oracle Support article "R12: Payables: Merged Vendor and Vendor Sites can be Updated in Supplier Entry Screen" via document ID 2107797.1 talks about what happens when vendor sites can be updated after being merged and an error is thrown when trying to merge it again.  Also, I learned about the table AP_DUPLICATE_VENDORS_ALL which will let you know if a vendor has ever been merged before and with the data pattern described in the document could give you a chance to build a proactive alert!