shared-workload-clusters-settings / "change of immutable fields for a generate rule is disallowed"

 Kustomization/sylva-system/shared-workload-clusters-settings - 
ReconciliationFailed - ClusterPolicy/sylva-system/shared-workload-clusters-setttings dry-run failed: 
admission webhook "validate-policy.kyverno.svc" denied the request:
change of immutable fields for a generate rule is disallowed