Missing Signed-By in the sources.list(5) for Ubuntu 24 LTS

[Autoflow]

We just upgraded Uyuni to Podman 2024.10 to take advantage of Ubuntu 24.04 LTS.
After adding the channels of Ubuntu 24.04 by using spacewalk-common-channels everything looked fine.

But now when manually running apt update on 24.04 systems we got following notice:

N: Missing Signed-By in the sources.list(5) entry for 'http://HOST:443/rhn/manager/download'
N: Missing Signed-By in the sources.list(5) entry for 'http://HOST:443/rhn/manager/download'

Is this a known problem?