(helm/v2-alpha): Setting manager.envOverrides to a duplicate key fails with ssa

Author: Jay-MaddenCreated Aug 4, 2026Updated Aug 6, 2026

Labelskind/bugkind/feature

What broke? What's expected?

Setting manager.envOverrides to a duplicate in scaffolded helm chart with helm/v2-alpha fails when server side applied.

Error from server: failed to create typed patch object (default/env-repro-[RANDOM_ID]-env-override-repro-controller-manager; apps/v1, Kind=Deployment): .spec.template.spec.containers[name="manager"].env:
 duplicate entries for key [name="WATCH_NAMESPACE"]

This will work in client-side apply as the latest key will be implicitly accepted but this will not work with SSA.

Reproducing this issue

I have prepared a (partially vibe coded) repro script here.

Output of a run. output.log

KubeBuilder (CLI) Version

v4.15.0

PROJECT version

Plugin versions

yaml

- go.kubebuilder.io/v4
plugins:
  helm.kubebuilder.io/v2-alpha:
    manifests: ./dist/install.yaml
    output: .
projectName: ...
repo: github.com/NVIDIA/...
resources:
- api:
    crdVersion: v1
    namespaced: true
  controller: true
  domain: cluster.x-k8s.io
  group: addons
  kind: SystemComponent
  path: github.com/NVIDIA/.../api/v1alpha1
  version: v1alpha1
  webhooks:
    validation: true
    webhookVersion: v1
- api:
    crdVersion: v1
  controller: true
  domain: cluster.x-k8s.io
  group: addons
  kind: SystemPackage
  path: github.com/NVIDIA/.../api/v1alpha1
  version: v1alpha1
version: "3"

Other versions

No response

Extra Labels

No response

Source: kubernetes-sigs/kubebuilder

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