Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain k8s-ingressn-ingressn-0e6b5eee5c-63461ed992060db1.elb.eu-central-1.amazonaws.com is not the root of its zone.
Instead, try zone transfer on elb.eu-central-1.amazonaws.com .
Instead, try zone transfer on elb.eu-central-1.amazonaws.com .