cannont enchant skills on existing awakened classes before diversification.

Hello,
I am having a problem enchanting the skills on my feoh dual class. i always get the same message saying:

"you cannot enchant skills on existing awakened classes before diversification." in my system chat box. I do not know what this means. Can anyone help?

I know other players with skills enchanted on both main and dual. Am i missing something here?

Did you pick a diversification? Maybe this was awakened before class diversification and you never picked one?

You need to pick a specialization for your Feoh dual before you can enchant skills.