Upgrade of Traefik Helm chart 16.2.0 to 17.0.x fails

Traefik Traefik v2 (latest)
1

Hi!

Starting from v10.20.0 I'm slowly upgrading Traefik to a recent version. This went well until chart version 16.2.0.

When I try to upgrade 16.2.0 --> 17.0.x (both Traefik v2.9.1), I'm getting the following :

Error: UPGRADE FAILED: cannot patch "traefik" with kind Deployment: Deployment.apps "traefik" is invalid: spec.selector: Invalid value: v1.LabelSelector{MatchLabels:map[string]string{"app.kubernetes.io/instance":"traefik-traefik", "app.kubernetes.io/name":"traefik"}, MatchExpressions:[]v1.LabelSelectorRequirement(nil)}: field is immutable

Could someone point into the right direction to fix this?

Thanks!
Pascal