Before you can upgrade a KeyControl node, you must remove any nodes that are in the same cluster. You can then upgrade the remaining node and use it as the basis of the new cluster.
The node that you log into with the KeyControl webGUI for this procedure will hereafter be called the "First Node", as it will become the first upgraded node in the cluster.
If the KeyControl node is part of a KeyControl Mapping, select the option Do not change the mapping at the prompt.
Because you are going to rejoin the node with the cluster, you do not have to change the KeyControl Mapping.
What to Do Next
Upgrade the First Node as described in Upgrading the First KeyControl Node Using the webGUI or Upgrading the First KeyControl Node Using an ISO Image.