Does the issue occur in the editor or during gameplay?
During Gameplay.
If it's a gameplay issue, please specify which movement system and camera type you're using (free movement vs. grid movement, third-person vs. first-person) or N/A if not applicable:
Real-time, Grid-based, 3rd person, but I believe it's N/A.
Briefly describe the issue you're experiencing:
If you save a game when player model is changed, you won't be able to load this save.
Are there any errors in the in-game debug console or external console window?

Provide the steps necessary to reproduce the issue:
- Change player model;
- Save your game;
- Try to load saved game