File Content is unsigned....

Does anyone know what this is about?

Warnung: File ‘content’ from repository ‘Haupt-Repository (OSS)’ is unsigned.

Note: Signing data enables the recipient to verify that no modifications occurred after the data
were signed. Accepting data with no, wrong or unknown signature can lead to a corrupted system
and in extreme cases even to a system compromise.
Note: File 'content' is the repositories master index file. It ensures the integrity of the
whole repo.
Warning: We can't verify that no one meddled with this file, so it might not be trustworthy
anymore! You should not continue unless you know it's safe.

This comes up after zypper dup --no-allow-vendor-change. Only the Tumbleweed repos and Packman are in my repo-list.

There are issues with catastrophic hardware failure at d.o.o, you should postpone updates for now until they can fix things and get all redirection and mirrors up to date.

Thanks. I will do so.