If you own the PS4 and PS5 versions of the same game, you can install both of them on your PS5 console at the same time.
If you have both versions installed, here is how to switch between them.
- From Home screen, go to [Game Library].
- Select the game and press [X] button.
- Select [...] button on the screen to display options.
- Select the version of the game title you want to download or play.
- In PS4 version, PS4 is displayed beside the game title at the top of the screen.
- In PS5 version, only the game title is displayed.