first time install ps4 why?

Ive had the game on my ps4 for about a year and a half its making me install the game again is this a bug or did my game get corrupted?

Has happened to me couple times you just select continue and log in with your account, have not noticed anything happen from it. It can also be forced by deleting a certain file in system management.

thank you for the reply and the help. ugg 180 minutes left -_-