I have a son that have been using my own PS4 account for playing several months. He have bought several skins, weapons etc.
I have now created a new PS4 account for my son to limit playting time etc. I have read that it is possible to "move" the Fortnite skins from my account over to another account via epicgames.com (instead of bying everything again). I followed this YouTube-tutorial:

But when I try to reconnect I get this message:

Link PlayStation Network Account

"This Epic account was previously linked to a different PlayStation network account. It can only be relinked to the old PlayStation account and not a new PlayStation account.If you would like to relink your PlayStation network account, sign in using your previously linked account credentials for the following PlayStation network display name: (<NewAccountName>)."

Anyone have tips on how to fix this?