Please, try people who do not have the Fanatical account.
This game key from 'Fanatical giveaway'. I made a mistake that I dind't check my Steam library if I have aleady own it.
If you have your own Fanatical account, you should visit Fanatical then you can get your own key from Fanatical.
If you do not have the Fanatical account, I wish you good luck.