if err != nil {
		return err
	}

	// Validate requested and validate actual version
	klog.V(1).Infoln("[upgrade/apply] validating requested and actual version")
	if err := configutil.NormalizeKubernetesVersion(&initCfg.ClusterConfiguration); err != nil {
		return err
	}

	// Use normalized version string in all following code.
	newK8sVersion, err := version.ParseSemantic(initCfg.KubernetesVersion)