This happens when someone else sneaks a push to the repository in between VersionSQL pulling the repo’s latest and pushing your changes. Bad timing, that’s all. Try the commit again and it should go through fine. A task is on the backlog to make VersionSQL auto-retry in this scenario.
If you see this message from the git command line, run
git pull to merge in updates from the repository remote, then
git push to push your changes again.