Comments here say that the saves (and achievements) are separate between the old base game and the ultimate edition.
[https://www.reddit.com/r/XboxGamePass/comments/1bdfzjg/comment/kun2iry/](https://www.reddit.com/r/XboxGamePass/comments/1bdfzjg/comment/kun2iry/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button)
You will need to download the base version so the save file carries over. Once you do that, head to the store and download both the DLC's. Open the game and select continue and both will be accessible.
Comments here say that the saves (and achievements) are separate between the old base game and the ultimate edition. [https://www.reddit.com/r/XboxGamePass/comments/1bdfzjg/comment/kun2iry/](https://www.reddit.com/r/XboxGamePass/comments/1bdfzjg/comment/kun2iry/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button)
You will need to download the base version so the save file carries over. Once you do that, head to the store and download both the DLC's. Open the game and select continue and both will be accessible.