Sometimes, when uninstalling and re-installing an operator (due to different upgrade issue), the installation fails, with the subscription getting a condition that references nonexistent CSVs as causing a problem.

In the example below, web terminal operator (v1.6.0) was uninstalled after a failed upgrade to v1.7.0 (due to another strange issue). When subscription is created again, no startingCSV is set so OLM should be trying to install v1.7.0.

The subscription gets conditions like
    - lastTransitionTime: '2023-03-09T19:12:20Z'
      message: all available catalogsources are healthy
      reason: AllCatalogSourcesHealthy
      status: 'False'
      type: CatalogSourcesUnhealthy
    - message: >-
        constraints not satisfiable: clusterserviceversion web-terminal.v1.6.0
        exists and is not referenced by a subscription,
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.5.0-0.1657220207.p,
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.2.1,
        @existing/crw//web-terminal.v1.6.0,
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.6.0,
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.3.0,
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.7.0 and
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.4.0
        originate from package web-terminal, bundle
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.2.1 is
        deprecated, subscription web-terminal requires at least one of
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.7.0,
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.6.0,
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.5.0-0.1657220207.p,
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.4.0,
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.3.0 or
        redhat-operators/openshift-marketplace/fast/web-terminal.v1.2.1,
        subscription web-terminal exists
      reason: ConstraintsNotSatisfiable
      status: 'True'
      type: ResolutionFailed

(note the ResolutionFailed condition reorders frequently and randomly)

The message in the condition suggests that an existing CSV is the issue

> clusterserviceversion web-terminal.v1.6.0 exists and is not referenced by a subscription

However, no such CSV exists in the installation namespace.

4.12.0

Occasionally; randomly.

1. Uninstall an operator via the OpenShift UI
2. Create a new subscription for the Operator

Subscription fails to resolve operator

Install should succeed, or at least mention what the actual issue is.

Encountered a number of times over the last few months in Developer Sandbox clusters.

Workaround:
* Restart catalog-operator pod in openshift-operator-lifecycle-manager namespace (delete running pod and let it be recreated)
* Delete failed subscription and re-create it