Service atomic-openshift-node failed to start with error unknown flag: --experimental-allowed-unsafe-sysctls

Issue

• The atomic-openshift-node service fails to start due to the error:-

# systemctl restart atomic-openshift-node.service

Nov 18 03:16:03 node1.example.com[51003]: --volume-stats-agg-period duration
Nov 18 03:16:03 node1.example.com[51003]: F1118 03:16:03.692041   51003 server.go:148] unknown flag: --experimental-allowed-unsafe-sysctls

• journalctl indicates the unsupported flags and service cannot be started.