我在研究kubernetes集群的授权。
我现在用的是minikube集群，版本是v1.13.2。
我正在尝试创建具有聚合功能的CumberRole，以便子CumberRole可以接收父CumberRole的规则。
这是我的.yaml文件的内容。

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: parent-clusterrole
  labels:
    rbac.authorization.k8s.io/aggregate-to-child-clusterrole: "true"
rules:
- apiGroups: [""]
  resources: ["nodes"]
  verbs: ["get", "list"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: child-clusterrole
aggregationRule:
  clusterRoleSelectors:
  - matchLabels:
    rbac.authorization.k8s.io/aggregate-to-child-clusterrole: "true"
rules: []

当我尝试使用kubectl apply -f {file-name}创建资源时，我收到了下面的结果。

clusterrole.rbac.authorization.k8s.io/parent-clusterrole created
Error from server (BadRequest): error when creating "clusterrole-aggregation.yaml": ClusterRole in version "v1" cannot be handled as a ClusterRole: strict decoding error: unknown field "aggregationRule.clusterRoleSelectors[0].rbac.authorization.k8s.io/aggregate-to-child-clusterrole"

是不是有什么错误的东西我抓不到？