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How to Fix Git 'index.lock' File Exists Error - How to Flush DNS on Windows 11 to Fix Internet Issues-How to Fix Git Push Rejected: Non-Fast-Forward Merge

Updated 2026-07-28 07:17:00office-tools

How to Fix Git 'index.lock' File Exists Error - How to Flush DNS on Windows 11 to Fix Internet Issues-How to Fix Git Push Rejected: Non-Fast-Forward Merge

Likely symptom

Likely cause

Safe rollback

Verification route

Repeat the original action, not only a simplified test case.
Restart the app or reload the service after configuration changes.