Clarify doc about the uniqueness of DAC using Helm Chert deployment

CAO 2.0.x, 2.1 and 2.2

Kering (and I) get confused about wether or not it is possible to have 1 only (or more) DAC in the cluster.

Deploying the DAC using K8s commands, it is clearly stated the DAC should be deployed once at cluster level.

https://docs.couchbase.com/operator/current/helm-setup-guide.html#deploying-multiple-chart-instances-releases

The example installation commands on this page assume the default namespace is used (these commands don't specify the -n option). This is important to note because the Couchbase Helm Chart deploys both the Autonomous Operator and the Admission Controller by default, and these components should not be deployed more than once in the same namespace. If you install the default Couchbase Helm Chart multiple times in the same namespace, then you'll end up with multiple instances of the Autonomous Operator and the Admission Controller, which will cause errors in your deployments.

What was unclear : there is no restriction on the number of times the DAC can be deployed. It is said it is allowed to deployed DAC and AO (not more than once) by namespace.

Suppose now we have 2 namespaces and exactly deploy 1 DAC and 1 AO, we respect this last rule but we are in a contradiction about the fact we should only have 1 DAC per K8s cluster!

The result is the AO will be using any (all?) DAC existing in the cluster, be it in its related namespace or not...

Can we clarify the documentation on that?

Thanks a lot.