vagrant cannot create a custom named network for virtualbox

master.vm.network "private_network", ip: "10.0.1.20", name: "k8s"

The specified host network could not be found: 'k8s.'
If the name specification is removed, Vagrant will create a new
host only network for you. Alternatively, please create the
specified network manually.

I tried to create the network manually using virtualbox gui, found out that I cannot using a custom name