I am the brand owner, registered in brand registry, the only seller and the only contributor to my listings.

I only have 1 seller account, but with multiple merchant token ID's (one for each region).

The UK store is the source store for all my ASINs/BIL source.

This one particular ASIN - which I sell in the UK, the EU, and US, somehow has the winning contributor source as my US merchant token ID, rather than my UK merchant token ID. Don't ask how, I presume some sort of system glitch which I didn't notice when I created the ASIN. The net effect is I am unable to change my title, bullets, or description (other than through A+ content) in the UK/EU store, because every time I want to make a change to the title Amazon sends me an email suggesting I make the change - which I suggested.

Needless to say I have contacted Seller support, brand support, brand registry, the catalogue team, and requested that they manually change the winning contributor for the listing in the UK store from my US/NA merchant token ID to my UK merchant token ID to enable me to manage the listing. Needless to say they have no clue how to help me, they are suggesting all sort of wild ideas which I will not bother posting here, unless you want to have a laugh.

Question: has anyone successfully changed the winning contributor on a listing? And if so how?

@Roberto_Amazon - I don't suppose you will see this and be able to work another miracle? :)

Case ID 10723966122