Fix Git index.lock File Exists Permission Denied Error - Fix Git Non-Fast-Forward Rejection-How to Use --allow-unrelated-histories in Git

Updated 2026-07-28 13:45:59office-tools
Fix Git index.lock File Exists Permission Denied Error - Fix Git Non-Fast-Forward Rejection-How to Use --allow-unrelated-histories in Git
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.