Regression: Errors on upgrading project "File ProjectSettings/ProjectSettings.asset couldn't be written"

when you opening this project in any version 5.0.1f1 - 5.1.0f1 and then in 5.1.0f2 - no errors
but when you opening this project directly in 5.1.0f2 - there are 2 errors

2. How we can reproduce it using the example you attached
1 Open attached project in Unity 5.1.0f2
Actual result: errors appear:
File ProjectSettings/ProjectSettings.asset couldn't be written. Because moving D:/1/NightmarePartDeux-project/Temp/UnityTempFile-3e594d0306b55b042a92c9f714f257b5 to D:/1/NightmarePartDeux-project/ProjectSettings/ProjectSettings.asset failed.