Compression middleware: Can´t specify encoding

Traefik Traefik v3 (latest)
1

Hi if i try to apply this Middleware:

apiVersion: traefik.io/v1alpha1
kind: Middleware
metadata:
  name: compress
spec:
  compress:
    defaultEncoding: br

I always get this error message:

The request is invalid: patch: Invalid value: "{\"apiVersion\":\"traefik.io/v1alpha1\",\"kind\":\"Middleware\",\"metadata\":{\"annotations\":{\"kubectl.kubernetes.io/last-applied-configuration\":\"{\\\"apiVersion\\\":\\\"traefik.io/v1alpha1\\\",\\\"kind\\\":\\\"Middleware\\\",\\\"metadata\\\":{\\\"annotations\\\":{},\\\"name\\\":\\\"compress\\\",\\\"namespace\\\":\\\"traefik\\\"},\\\"spec\\\":{\\\"compress\\\":{\\\"defaultEncoding\\\":\\\"br\\\"}}}\\n\"},\"creationTimestamp\":\"2024-08-20T14:35:43Z\",\"generation\":1,\"labels\":{\"kustomize.toolkit.fluxcd.io/name\":\"flux-system\",\"kustomize.toolkit.fluxcd.io/namespace\":\"flux-system\"},\"managedFields\":[{\"apiVersion\":\"traefik.io/v1alpha1\",\"fieldsType\":\"FieldsV1\",\"fieldsV1\":{\"f:metadata\":{\"f:labels\":{\"f:kustomize.toolkit.fluxcd.io/name\":{},\"f:kustomize.toolkit.fluxcd.io/namespace\":{}}},\"f:spec\":{\"f:compress\":{}}},\"manager\":\"kustomize-controller\",\"operation\":\"Apply\",\"time\":\"2024-08-20T14:35:43Z\"}],\"name\":\"compress\",\"namespace\":\"traefik\",\"resourceVersion\":\"223938744\",\"uid\":\"334dd801-9aca-4934-8336-e9a6d6cc55bf\"},\"spec\":{\"compress\":{\"defaultEncoding\":\"br\"}}}": strict decoding error: unknown field "spec.compress.defaultEncoding"

I am on traefik 3.1.4 with helm chart 32.0.0