After running
dnf system-upgrade download --releasever=34
and downloading all files, I got the following warning
warning:
/var/lib/dnf/system-upgrade/fedora-e21c25ac3662d294/packages/fstrm-0.6.0-4.fc34.x86_64.rpm:
Header V4 RSA/SHA256 Signature, ID key 45719a39: NOKEY
Why this package does not have a key?
Cheers