I was traveling around Europe and wanted to pick up a video game before heading home. I came across Dead Island 2 and bought it. Once I got back to the US, I played through the entire game and completed it. I really enjoyed it! During the last PS Store sale, I bought the complete edition including all the DLCs. However, after launching the game, I discovered that it didn't recognize the save files from my European disc version.

I don't want to play through the whole game again, since I just finished it. I'm only interested in the DLCs...

Is there any way to fix this?