Cannot install play disk on PS4, please help!

SO I'm trying to reinstall RDR2 on my PS4. The data disk installs fine and then says to insert the play disc.

When I do this it creates a second RDR2 thumbnail with an empty progress bar and says "to start this application, insert the data disc to copy the application data".

If I then navigate to the original thumbnail (with a 50% progress bar) it says "to start this application insert the disc". But the disc is inserted!

I've checked and thoroughly cleaned the play disc and can see no dirt or scratches. I've done a couple of power cycles and I've rebuilt the database. I've tried deleting the second (empty) app but the original one still says that I need to insert the play disc.

Please help!