Wrong Game User Id. User ID is not an id number it is an email address or a user name. My Watch General.
Select settings after clicking on the gear icon. Sign in with Epic Games. You may unlink an account once every 12 months.
Click on Apply and then click on OK.
Had the same problem you can log into your epic games account and then go to settings and account linking and unlink your Xbox account from the wrong epic games account. Then go login to the correct epic games account and link your Xbox account. You can either follow our guide or submit a ticket to the support. If you merge the accounts one of them will loose all progress.
