Can't bootstrap openstack based K8S controller

This worked last week now it doesn't:

juju add-k8s internal-k8s --region=openstack/RegionOne --storage=openstack-standard

juju bootstrap internal-k8s

It says:

ERROR failed to bootstrap model: creating controller stack for controller: creating namespace for controller stack: Namespace "controller-internal-k8s-RegionOne" is invalid: metadata.name: Invalid value: "controller-internal-k8s-RegionOne": a DNS-1123 label must consist of lower case alphanumeric characters or '-', and must start and end with an alphanumeric character (e.g. 'my-name', or '123-abc', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?')

Because it appends the openstack region to the controller namespace.