Long story short, I accidentally ordered 2x PC codes for Shadowbringers from Amazon.

My girlfriend plays on PS4, and I also purchased a copy through PSN for her and hers is activated.

Since I can no longer return the code, I was going to add the PC key to her account as well so she can play on PC and PS4. However, when I enter the key into add Windows license it says it is invalid.

I was under the impression Shadowbringers included the entire game/previous expansions. Any ideas?