Originally Posted by
Kalce
This may sound like silly question, but is it possible that it's the same code that you got for the beta?
As I understand it PSN doesn't care whether it's beta, early access or release, for it it's all the same game, so chances are SE didn't actually need to give you another code, and you had already added the game to your PSN account by using the code from the beta.
As long as you see a FFXIV: ARR entry when checking your PSN account services (PS4 Settings > PSN > Account Information > Services) you should be good.