Rancher Helm chart name reversion: handle ingress error

[btat]

Per feedback from Slack:

I was taking a look at upgrading Rancher 2.13.1 to 2.13.2 and noticed that even though the documentation at https://documentation.suse.com/cloudnative/rancher-manager/v2.13/en/installation-and-upgrade/upgrades.html mention the helm chart name change from "rancher-prime" back to "rancher", it doesn't actually   clearly tell the user what to do. There will be an error about the ingress, and if you don't remove it first, the upgrade will fail. Maybe we should add this detail to the docs?

here's the two conflicting helm chart names:

helm repo update
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "rancher-prime" chart repository
Update Complete. ⎈Happy Helming!⎈

helm search  repo
NAME                            CHART VERSION   APP VERSION     DESCRIPTION           
                            
rancher-prime/rancher           2.13.2          v2.13.2         Install SUSE Rancher Prime to manage Kubernetes...
rancher-prime/rancher-prime     2.13.1          v2.13.1         Install SUSE Rancher Prime to manage Kubernetes...

Here is the error:

helm upgrade rancher rancher-prime/rancher \
  --namespace cattle-system --set hostname=<HOSTNAME>  
Error: UPGRADE FAILED: failed to create resource: admission webhook "validate.nginx.ingress.kubernetes.io" denied the request: host "<HOSTNAME>" and path "/" is already defined in ingress cattle-system/rancher-rancher-prime

And here is the solution:

helm get values rancher -n cattle-system -o yaml > rancher-values.yaml
kubectl delete ingress rancher-rancher-prime -n cattle-system
ingress.networking.k8s.io "rancher-rancher-prime" deleted

helm upgrade rancher rancher-prime/rancher \
  --namespace cattle-system \
  -f rancher-values.yaml \
  --version 2.13.2
Release "rancher" has been upgraded. Happy Helming!
NAME: rancher
LAST DEPLOYED: Wed Feb 11 12:58:29 2026
NAMESPACE: cattle-system
STATUS: deployed