Checkpoints (GameDied)

I am currently working with a checkpoint system for a jumping puzzle section in a level. Sadly, during the working phase of this system, unity decided to break on me, and now I currently have no access to my entire project because of this error. Unity is telling me "Size overflow in allocator." Unity couldn't find any fixes for this bug, so I have been forced to start all over again. The game will be drastically changed from what it was. It will have a better direction and story in mind so hopefully this change will be better than the previous version. Wish me luck! I will finish this project one way or another.