You can change the source marketplace from which your target marketplaces are synchronized
by following these steps:
Follow the steps in Remove a connection using Build International Listings to remove connections
for all target marketplaces. This may take up to four hours for each marketplace from
the time you made the request. You will get an email when each removal request is
complete.
Tip: To avoid processing errors, wait until all removal requests
are complete before you create new connections.