(I apologize if this is in the wrong forum)

I stopped playing ESO over a year ago due to the demands of real life, and I am thinking of coming back for Morrowind.
Im a HUGE TES:III fan and the nostalgia trip would be great (I hope)

Anyway....
Under "My Account" it says ...

THE ELDER SCROLLS® ONLINE: TAMRIEL UNLIMITED™ XBOX ONE EDITION
Member Since December 10, 2015

Gamer Tag
(Insert my GT here)

Account Status
Active

I no longer have my game disc, and I would like to know if I need to buy the full version of Morrowind?
Or will the upgrade suffice?

Thanks!