Why can not update Advanced StatefulSet PodManagementPolicy?

[penghuazhou]

When update Advanced StatefulSet, it show below? Why do not allow update PodManagementPolicy?
admission webhook "vstatefulset.kb.io" denied the request: spec: Forbidden: updates to statefulset spec for fields other than 'replicas', 'template', 'reserveOrdinals', 'lifecycle', 'revisionHistoryLimit', 'persistentVolumeClaimRetentionPolicy' and 'updateStrategy' are forbidden

// ValidateStatefulSetUpdate tests if required fields in the StatefulSet are set.
func ValidateStatefulSetUpdate(statefulSet, oldStatefulSet *appsv1beta1.StatefulSet) field.ErrorList {
    allErrs := apivalidation.ValidateObjectMetaUpdate(&statefulSet.ObjectMeta, &oldStatefulSet.ObjectMeta, field.NewPath("metadata"))
 
    restoreReplicas := statefulSet.Spec.Replicas
    statefulSet.Spec.Replicas = oldStatefulSet.Spec.Replicas
 
    restoreTemplate := statefulSet.Spec.Template
    statefulSet.Spec.Template = oldStatefulSet.Spec.Template
 
    restoreStrategy := statefulSet.Spec.UpdateStrategy
    statefulSet.Spec.UpdateStrategy = oldStatefulSet.Spec.UpdateStrategy
 
    restorePersistentVolumeClaimRetentionPolicy := statefulSet.Spec.PersistentVolumeClaimRetentionPolicy
    statefulSet.Spec.PersistentVolumeClaimRetentionPolicy = oldStatefulSet.Spec.PersistentVolumeClaimRetentionPolicy
 
    restoreScaleStrategy := statefulSet.Spec.ScaleStrategy
    statefulSet.Spec.ScaleStrategy = oldStatefulSet.Spec.ScaleStrategy
 
    restoreReserveOrdinals := statefulSet.Spec.ReserveOrdinals
    statefulSet.Spec.ReserveOrdinals = oldStatefulSet.Spec.ReserveOrdinals
    statefulSet.Spec.Lifecycle = oldStatefulSet.Spec.Lifecycle
    statefulSet.Spec.RevisionHistoryLimit = oldStatefulSet.Spec.RevisionHistoryLimit
 
    if !apiequality.Semantic.DeepEqual(statefulSet.Spec, oldStatefulSet.Spec) {
        allErrs = append(allErrs, field.Forbidden(field.NewPath("spec"), "updates to statefulset spec for fields other than 'replicas', 'template', 'reserveOrdinals', 'lifecycle', 'revisionHistoryLimit', 'persistentVolumeClaimRetentionPolicy' and 'updateStrategy' are forbidden"))
    }

[zmberg]

@penghuazhou The current community is also restricted in this way. In addition, do you want Ordered -> Parallel?

[penghuazhou]

@zmberg , yes, I want Ordered -> Parallel.