[account link] Account linking issue

Following the creation of an email address for my son,

I changed the connection ID on the PlayStation, on the account he was using so that he connects to the same account with his address.

So I created an Xbox account with this email address in order to link it to Minecraft but it tells me that I cannot connect with the new address because the old one is still linked to the PlayStation account.

 

I want to use the new address and therefore the new Xbox account on Minecraft. on playstation.