Usually, the developer of the add-on module occasionally releases the newest version of the add-on. This update typically contains bug fixes and new features. Here, we will get a new version of the add-on and update it in our instances.

If git pull --ff-only fails, you can revert to the previous version using the following command:

$ git reset --hard 12.0-before-update-$(date --iso)

Then, you can try git pull (without --ff-only), which will cause a merge, but this means that you have local changes on the add-on.