Quote Originally Posted by Niwashi View Post
I saw the same error on my secondary account a couple months or so ago when they were running a special offering Heavensward for free. Even though I had ARR, it said I couldn't add Heavensward because I didn't have FFXIV A Realm Reborn Standard Edition. (I had ARR Collectors Edition.) So instead I used the code I had from a disc version and it worked.

On my main account (where I'd originally intended to use that disc copy) the free upgrade from PSN worked.

I'm not sure why PSN would be able to add an expansion to one account and not another when it already recognized that I had the base game on both. Nor am I sure why, on an account where it was unable to add an expansion through a direct PSN purchase, it could still add it from entering a code for it. (It seems like the sort of error that Customer Service should be able to sort out, but since I already had a copy on disc and was able to make it work with that, I didn't call them.)

As to whether buying the disc version of Shadowbringers would get around the problem and enable you to register it, I'd say it probably would. At least it did for me on Heavensward. But it's a weird enough error that I can't guarantee you'd get the same result.
Thank you. I guess you're right, the error is weird enough to make it iffy. I contacted PSN customer service, maybe they can help!