Running the below command results in an error. Even if I manually delete the namespace before.

$ helm-2.7.2 --kube-context nine-ml-dev install erst/jenkins-devops-package --namespace sud-devops --name sud-devops --version 1.11.0 --values nine-ml-dev/sud-jenkins-server.yaml 

Error: release sud-devops failed: namespaces "sud-devops" already exists

But if I leave out the --namespace it goes to default. What's the proper way to specify a namespace for my package?