Every time I try to run an update through deployment manager to an existing deployment in preview, I get the error:
$ gcloud deployment-manager deployments update abc --config abc.yaml
ERROR: (gcloud.deployment-manager.deployments.update) ResponseError: code=400, message=Invalid value for field 'resource.target': ''. Deployment in preview must not have a target with UPDATE
However, if I don't use the update on the gcloud command line and go to the console and click 'deploy' the update goes through fine.
What can be causing this?