Description of problem:
When attempting to hot-plug an interface, that was already hot-plugged (i.e. same interface name), there is no error message, so it gives the impression that the action succeeeds.

Version-Release number of selected component (if applicable):
Client Version: version.Info

{GitVersion:"v1.0.0-beta.0-449-g2d9380079", GitCommit:"2d93800792c87fd0f744a13f80ce82260dd6e279", GitTreeState:"clean", BuildDate:"2023-06-28T15:10:11Z", GoVersion:"go1.19.9", Compiler:"gc", Platform:"linux/amd64"}

Server Version: version.Info

{GitVersion:"v1.0.0-beta.0-449-g2d9380079", GitCommit:"2d93800792c87fd0f744a13f80ce82260dd6e279", GitTreeState:"clean", BuildDate:"2023-06-28T15:10:09Z", GoVersion:"go1.19.9", Compiler:"gc", Platform:"linux/amd64"}

How reproducible:
Always

Steps to Reproduce:
1. Create and run a basic VM (no secondary NICs).
$ oc create ns yoss-ns
namespace/yoss-ns created
$ oc project yoss-ns
Now using project "yoss-ns" on server "https://api.net-ys-414o.rhos-psi.cnv-qe.rhood.us:6443".
$ oc apply -f vm-fedora.yaml
virtualmachine.kubevirt.io/vm-fedora created
$ virtctl start vm-fedora
VM vm-fedora was scheduled to start

2. Create a bridge interface over one of the nodes secondary NICs using a NodeNetworkConfigurationPolicy.
$ oc apply -f nncp-linux-bridge.yaml
oc get nncp -w
nodenetworkconfigurationpolicy.nmstate.io/hotplug-linux-bridge created
ysegev@ysegev-fedora (hotplug) $ oc get nncp -w
NAME STATUS REASON
hotplug-linux-bridge
hotplug-linux-bridge Progressing ConfigurationProgressing
hotplug-linux-bridge Progressing ConfigurationProgressing
...
hotplug-linux-bridge Available SuccessfullyConfigured

3. Create a NetworkattachmentDefinition for the bridge.
$ oc apply -f bridge-nad.yaml
networkattachmentdefinition.k8s.cni.cncf.io/hp-br-nad created

4. Run the command to add the new interface to the VM:
$ virtctl addinterface vm-fedora --network-attachment-definition-name hp-br-nad --name hp2

5. Repeat the last command again:
$ virtctl addinterface vm-fedora --network-attachment-definition-name hp-br-nad --name hp2

Actual results:
No failure message, looks like the question succeeds.

Expected results:
Alerting the user that the interface already exists.

Additional info:
In action nothing happens - no new entry is created in the VM spec in either `networks` and `interfaces`.