What were you trying to do that didn't work?

[machines] Should be able to detect that Vsock is already setted after save in Pause status

Please provide the package NVR for which bug is seen:

cockpit-machines-298-2.el9_3.noarch

cockpit-301-1.el9.x86_64

libvirt-client-9.3.0-2.el9.x86_64

How reproducible:

100%

Steps to reproduce

1. Prepare a running vm like cirros
2. Pause the vm
3. Click "add" after Vsock,  set a value like 3 and click Add 
4. Click "add" again, set another value and click Add 

There is error:

Failed to configure vsock

ERROR XML error: only a single vsock device is supported

Expected results

It should detect and show the Vsock after fistly click add in step 3

Actual results

As shown in step 4.