Error running deploy.sh

When I follow the instructions everything goes well until I run deploy.sh and I get the message below:

```
@cloudshell:~/cloudshell_open/btcpayserver-googlecloud (btcpayservermark)$ ./deploy.sh bt
cpaytestnet1
ERROR: (gcloud.deployment-manager.deployments.create) ResponseError: code=409, message='projects/btcpayse
rvermark/global/deployments/btcpaytestnet1' already exists and cannot be created.
btcpaytestnet1-vm was deployed.
Did you mean zone [us-central1-a] for instance: [btcpaytestnet1-vm]
(Y/n)? Y
ERROR: (gcloud.compute.instances.describe) Could not fetch resource:
- The resource 'projects/btcpayservermark/zones/us-central1-a/instances/btcpaytestnet1-vm' was not found
```

Start with the deployment instructions and the ./deploy.sh entry point, using the reported btcpaytestnet1 deployment name. Inspect the existing deployment and the btcpaytestnet1-vm instance in Google Cloud; done means the deployment completes without a conflict and the expected instance can be found.

Written by the indexing model from the issue text.