Issue adding new machineconfig in the cluster

Hi Team , I am trying to add a new machineconfig in the cluster with default service account and getting following error , Could you help me in resolving this issue ? Thanks !

h-4.4# oc apply -f 50-sshd-worker.yaml
Error from server (Forbidden): error when retrieving current configuration of:
Resource: "machineconfiguration.openshift.io/v1, Resource=machineconfigs", GroupVersionKind: "machineconfiguration.openshift.io/v1, Kind=MachineConfig"
Name: "50-sshd-config-worker", Namespace: ""
from server for: "50-sshd-worker.yaml": machineconfigs.machineconfiguration.openshift.io "50-sshd-config-worker" is forbidden: User "system:serviceaccount:openshift-ovn-kubernetes:default" cannot get resource "machineconfigs" in API group "machineconfiguration.openshift.io" at the cluster scope