$ juju bootstrap admin azure
Creating Juju controller "local.admin" on azure/centralus
Bootstrapping model "admin"
Starting new instance for initial controller
ERROR failed to bootstrap model: creating controller resource group: creating virtual network: creating virtual network "juju-internal": autorest:DoErrorUnlessStatusCode PUT https://management.azure.com/subscriptions/XXX/resourceGroups/juju-admin-model-YYY/providers/Microsoft.Network/virtualnetworks/juju-internal?api-version=2015-05-01-preview failed with 409 Conflict