How to reproduce:
1. Create a new project and set it up to use Perforce's version control (With an older version, for example, 2019.2.0a8)
2. Observe the "ProjectVersion.txt" file in the ProjectSettings directory (It is writable and shows the correct 2019.2.0a8 version)
3. Update the project to a newer version (2019.2.0a9) and observe the ProjectVersion.txt file again (It is still writable and shows the correct 2019.2.0a9 version)
4. In Perforce revert the "ProjectVersion.txt" file

Expected result: the file shows the 2019.2.0a9 version in its log and is writable
Actual result: the file is now marked as "read-only" and updating the project to 2019.2.0a10 will not correctly update the file

Reproduced in: 2019.2.0a10, 2019.1.0b10, 2018.3.12f1

Note: When reverting the log also incorrectly shows the last used version as 2019.2.0a10 even when it was never launched in one