// v1.22: v1beta2 read-only, writes only v1beta3 config. Errors if the user tries to use v1beta1 and older
	// v1.27: only v1beta3 config. Errors if the user tries to use v1beta2 and older
	oldKnownAPIVersions := map[string]string{
		"kubeadm.k8s.io/v1alpha1": "v1.11",
		"kubeadm.k8s.io/v1alpha2": "v1.12",
		"kubeadm.k8s.io/v1alpha3": "v1.14",
		"kubeadm.k8s.io/v1beta1":  "v1.15",
		"kubeadm.k8s.io/v1beta2":  "v1.22",
	}