Add prefix to external secret

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: add-external-secret-prefix
  annotations:
    policies.kyverno.io/title: Add prefix to external secret
    policies.kyverno.io/category: ExternalSecretOperator
    policies.kyverno.io/severity: medium
    policies.kyverno.io/subject: ExternalSecret
    kyverno.io/kyverno-version: 1.7.1
    policies.kyverno.io/minversion: 1.6.0
    kyverno.io/kubernetes-version: "1.23"
    policies.kyverno.io/description: "This Policy mutates secretRef key to add a prefix. External Secret Operator proposes to use kyverno to force ExternalSecrets to have namespace prefix so that kubernetes administrators do not need to define permissions and users per namespace. Doing this developers are abstracted by administrators naming convention and will not  be able to access secrets from other namespaces. In this example, in the JSON patch change \"prefix-\" to your preferred prefix. For example: {{ request.namespace }}"
spec:
  rules:
    - name: add-external-secret-prefix
      match:
        any:
          - resources:
              kinds:
                - external-secrets.io/v1beta1/ExternalSecret
      mutate:
        foreach:
          - list: request.object.spec.data
            patchesJson6902: |-
              - path: /spec/data/{{elementIndex}}/remoteRef
                op: add
                value:
                  key: "prefix-{{element.remoteRef.key}}"
                  property: "{{element.remoteRef.property}}"
                  conversionStrategy: "{{element.remoteRef.conversionStrategy}}"
                  decodingStrategy: "{{element.remoteRef.decodingStrategy}}"