Comment 0 for bug 2024486

**Description:**

I followed the official tutorial to set up an openstack cluster using sunbeam on a single node (not guided). The cluster was working fine until I decided to tear it down and start over as I wanted to access my VMs via external network. I used the official guide on tearing it down, but I encountered the following error even before I was prompted for MetalLB address allocation range:

```
Sunbeam Cluster not initialized
Error bootstrapping Juju
Traceback (most recent call last):
  File "/snap/openstack/182/lib/python3.10/site-packages/sunbeam/commands/juju.py", line 228, in run
    process = subprocess.run(cmd, capture_output=True, text=True, check=True)
  File "/usr/lib/python3.10/subprocess.py", line 524, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/snap/openstack/182/juju/bin/juju', 'bootstrap', 'sunbeam', 'sunbeam-controller']' returned non-zero exit status 1.
Creating Juju controller "sunbeam-controller" on sunbeam/default
Looking for packaged Juju agent version 3.2.0 for amd64
Located Juju agent version 3.2.0-ubuntu-amd64 at https://streams.canonical.com/juju/tools/agent/3.2.0/juju-3.2.0-linux-amd64.tgz
ERROR failed to bootstrap model: machine is already provisioned

Error: Command '['/snap/openstack/182/juju/bin/juju', 'bootstrap', 'sunbeam', 'sunbeam-controller']' returned non-zero exit status 1.
```

It seems that the cluster bootstrap fails because the machine is already provisioned, even though I deleted the cluster before.

**Steps to reproduce:**

1. Follow the official tutorial to set up an openstack cluster using sunbeam: https://ubuntu.com/openstack/install#single-multi-large-cluster
2. Verify that the cluster is working
3. Tear down the cluster by running using the official tearing down guide:
https://ubuntu.com/tutorials/tear-down-your-openstack-lab-environment#1-overview
4. Try to create a new cluster using step 1

**Expected result:**

The cluster bootstrap should succeed and create a new cluster.

**Actual result:**

The cluster bootstrap fails with the error message above.

**Environment:**

- OS: Ubuntu 22.04.2 LTS