The "NAN" bug [BUG]

[funjdjjc]

Describe the bug
The Attribute tab shows "NAN" next to the names of the Technical Chief, Race Engineers, Head of Aerodynamics, and Sporting Directors. Their overall attribute points are set to zero. They are all above the retirement age, but the retirement bar hasn't lit up. Whenever I reset their age and attribute points and then hit save, it says "successfully saved", but it never actually saves. It just resets to the "NAN" state and they never appear in the game.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Attribute'
2. Click on 'Technical Chief, Race Engineers, Head of Aerodynamics, and Sporting Directors.'
3. Scroll down to 'where NAN shows'
4. See error

Expected behavior
Retired staff shows up in the game with new attribute points.

Save file and Log.zip