Chosen Solution
I accidentally put a ps4 game into a ps3 while a ps3 game was inside. I managed to eject the ps3 game easily but I can’t get the ps4 game out. It keeps thinking it doesn’t have another disk in it and I’m afraid I lost my game forever.
So the eject button isn’t working? Here is the guide via Playstation for manually ejecting your disc. Good luck.
If all else fails, you may have to open the disk drive and pull the disk out manually.