Can I upgrade Confluence to a newer version that was released before our licence expired?
The upgrade guide says:
1. Confirm that your license support period is still valid before you try to upgrade.
2. If your current license has expired but you have a new license with you, please update your license in Confluence before performing the upgrade.
If you forget to do this and your license has expired, you will receive errors during the upgrade process.
But why shouldn't I be able to upgrade to a version that was released when our licence was valid?
Note: We only need to upgrade so that we can migrate one wiki into anouther.