Another important thing:
IMPORTANT: Plan yourself before migrating to Uyuni 2021.01. The database changes can take from 30 minutes to several hours. Check the release notes for more information.
This note is on the site  and on the release notes  (you should always read them before performing an update), but having this at the email announcement is important as well.
Thanks to Michael Calmer for warning me about it.
On viernes, 5 de febrero de 2021 13:20:17 (CET) Julio González Gil wrote:
We are happy to announce the immediate availability of Uyuni 2021.01
At https://www.uyuni-project.org/pages/stable-version.html you will find all the resources you need to start working with Uyuni 2021.01, including the release notes, documentation, requirements and setup instructions.
IMPORTANT: Keep in mind Uyuni 2020.07 changed the base OS to openSUSE Leap 15.2, so a special procedure is needed if you are not upgrading from 2020.07 or later, but from a previous version! Check the release notes and the documentation for all the details
This is the list of highlights for this release:
- Fix version comparison algorithm for deb packages (Ubuntu)
- New products enabled
- SAP content
- CPU mitigations formula
- Vendor change on SP migration
- Autoinstallation of older operating systems
- Oracle Linux ULN repositories
- CentOS 6 repositories
- New countries and timezones
- Cluster management: upgrade plan
- Yomi refresh
- Uyuni Server connections are always and only secure
- Monitoring updates
- Grafana 7.3.1
- Prometheus 2.22.1
- Prometheus Exporter Exporter for Ubuntu 18.04/20.04 and Debian 9/10
Please check the release notes for full details.
For the fixes for salt CVEs, there will be an Uyuni 2021.02 release by the end of February as the fixes rescheduled by upstream 
Remember that Uyuni will follow a rolling release planning, so the next version will contain bugfixes for this one and any new features. There will be no maintenance of 2021.01
As always, we hope you will enjoy Uyuni 2021.01 and we invite everyone of you to send us your feedback  and of course your patches, if you can contribute.