How to downgrade a system to a lower minor release (e.g. RHEL8.10 to RHEL8.8 EUS)

This article explains how to downgrade a system to a lower minor release. This procedure is not supported per se but may be helpful in case a system had wrong repositories configured and got inadvertently updated.

For demonstration purposes, we will assume that a RHEL8 system got updated to latest RHEL 8.10 already, while it should have been configured to be updated to ...