Change e-mail

I had registered by useing my secondary e-mail in Adobe ID and I want to change it to my first e-mail, a gmail that I have at google.

I am trying to change it from personal infos, but when I am giveing the gmail it says that "Email already used".

That is because when I had loged in from "Google acount" once and an acount may created.

So I connected with gmail and I deleted this account.

Bad it still don't allow me one month later to change my mail from my secondary to my gmail and says again "Email already used"!