Volcano queue is not deleted

$ k delete queue queue0
Error from server: admission webhook "validatequeue.volcano.sh" denied the request: only queue with state `Closed` can be deleted, queue `queue0` state is `Open`

[info] org.apache.spark.deploy.k8s.integrationtest.VolcanoSuite *** ABORTED *** (7 minutes, 40 seconds)
[info]   io.fabric8.kubernetes.client.KubernetesClientException: Failure executing: DELETE at: https://44bea09e70a5147f6b5b347ec26de85f.gr7.us-west-2.eks.amazonaws.com/apis/scheduling.volcano.sh/v1beta1/queues/queue-2u-3g. Message: admission webhook "validatequeue.volcano.sh" denied the request: only queue with state `Closed` can be deleted, queue `queue-2u-3g` state is `Open`. Received status: Status(apiVersion=v1, code=400, details=null, kind=Status, message=admission webhook "validatequeue.volcano.sh" denied the request: only queue with state `Closed` can be deleted, queue `queue-2u-3g` state is `Open`, metadata=ListMeta(_continue=null, remainingItemCount=null, resourceVersion=null, selfLink=null, additionalProperties={}), reason=null, status=Failure, additionalProperties={}).