# Troubleshooting upgrades

Review common issues and solutions for issues that may impact the upgrade process, or may occur after an upgrade.

## Links

* [Restoring from a failed upgrade](/en/enterprise-server@3.22/admin/upgrading-your-instance/troubleshooting-upgrades/restoring-from-a-failed-upgrade)

  Learn how to roll back from a failed upgrade.

* [Known issues with upgrades to your instance](/en/enterprise-server@3.22/admin/upgrading-your-instance/troubleshooting-upgrades/known-issues-with-upgrades-to-your-instance)

  See an overview of workarounds for issues that impact the upgrade process for GitHub Enterprise Server, or impact your instance after you complete an upgrade.

* [Rotating the signing key for upgrade packages](/en/enterprise-server@3.22/admin/upgrading-your-instance/troubleshooting-upgrades/rotating-the-signing-key-for-upgrade-packages)

  Learn how to rotate the GPG public key on GitHub Enterprise Server when GitHub updates the key used to sign upgrade packages.