Opened a support case to update an old ASIN with new GS1 UPC. They disassociated the old UPC and now my ASIN has disappeared.

Purchased a new GS1 barcode to update an old ASIN and requested Brand Registry Support to update the UPC. Their response was that they’ve disassociated the old UPC and instructed us to update the product identifier through The Edit Details interface which is now editable.

Upon disassociating the old UPC, our listing and ASIN is now search suppressed and “No Results Found” when searching the ASIN. The associated SKU now has a random ASIN attached to it. Attempting to edit the UPC like they instructed is not possible because that field is still greyed out and locked (with lock symbol).

I reopened the case and escalated to the Catalog Team to update the UPC. They did not escalate and Brand Registry support responded with the same instructions and stated that re-opening the case again will not result in a different outcome.

Any ideas how to update the UPC as instructed? Should I re-open the case and be persistent? Any tips or ideas are greatly appreciated.