<p>After connecting my Gitlab repo to my self-putup Kubernetes cluster via Operations > Kubernetes, I want to install Helm Tiller via the GUI; but I get:</p>

<blockquote>
  <p>Something went wrong while installing Helm Tiller</p>
  
  <p>Kubernetes error: configmaps "values-content-configuration-helm" already exists</p>
</blockquote>

<p>There are no pods running on the cluster and <code>kubectl version</code> returns:</p>

<blockquote>
  <p>Client Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.2", GitCommit:"bb9ffb1654d4a729bb4cec18ff088eacc153c239", GitTreeState:"clean", BuildDate:"2018-08-07T23:17:28Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"}</p>
  
  <p>Server Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.2", GitCommit:"bb9ffb1654d4a729bb4cec18ff088eacc153c239", GitTreeState:"clean", BuildDate:"2018-08-07T23:08:19Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"}</p>
</blockquote>

<p><strong>update</strong></p>

<p>the output of <code>kubectl get cm --all-namespaces</code>:</p>

<pre><code>NAMESPACE           NAME                              DATA AGE
gitlab-managed-apps values-content-configuration-helm 3    7d
...
</code></pre>

<p>deleting this namespace solves the issue!</p>

<p>Find the <code>gitlab-managed-apps</code> namespace with <code>kubectl get cm --all-namespaces</code>:</p>

<pre><code>NAMESPACE           NAME                              DATA AGE
gitlab-managed-apps values-content-configuration-helm 3    7d
...
</code></pre>

<p>deleting this namespace solves the issue:</p>

<pre><code>kubectl delete namespace gitlab-managed-apps
</code></pre>

<p>Thanks to <a href="https://stackoverflow.com/users/1933452/lev-kuznetsov">Lev Kuznetsov</a>.</p>
