Can't Fortnite Account link to a new ps4?

Hello folks unswar I play fortnite on xbox but a few months ago I played his buddy ps4 fortnite on my buddy and I linked my epic accaunt to your ps4 but now I have my own ps4 and would like to link my epic account to my ps4 which unfortunately does not come Always a message that my epic account is already linked to an external account and that it does not work

You need 1000 Vbucks for that.

: D continue