Operator cannot be upgraded with the error "Cannot update: CatalogSource was removed" while the CatalogSource exists in OpenShift 4

Issue

• The status of the operator shows "Cannot update" and "CatalogSource was removed" or "CatalogSource not found" on the Installed Operators page while the CatalogSource exists.

• Error messages similar to the following ones can be seen in the logs of the catalog-operator pod:

  type: 'Warning' reason: 'ResolutionFailed' constraints not satisfiable: subscription jaeger-product exists, subscription jaeger-product requires redhat-operators/openshift-marketplace/stable/jaeger-operator.v1.28.0, clusterserviceversion jaeger-operator.v1.28.0 exists and is not referenced by a subscription, redhat-operators/openshift-marketplace/stable/jaeger-operator.v1.28.0 and @existing/openshift-operators//jaeger-operator.v1.28.0 provide Jaeger (jaegertracing.io/v1)
  

  type: 'Warning' reason: 'ResolutionFailed' constraints not satisfiable: no operators found from catalog redhat-operators in namespace openshift-marketplace referenced by subscription 3scale-operator, subscription 3scale-operator exists
  

  type: 'Warning' reason: 'ResolutionFailed' constraints not satisfiable: @existing/openshift-operators//servicemeshoperator.v2.1.1 and @existing/openshift-operators//servicemeshoperator.v2.2.1 provide ServiceMeshControlPlane (maistra.io/v1), subscription servicemeshoperator requires @existing/openshift-operators//servicemeshoperator.v2.2.1, subscription servicemeshoperator exists, clusterserviceversion servicemeshoperator.v2.1.1 exists and is not referenced by a subscription
  

  type: 'Warning' reason: 'ResolutionFailed' constraints not satisfiable: @existing/openshift-operators//openshift-gitops-operator.v1.4.2, @existing/openshift-operators//openshift-gitops-operator.v1.4.3 and redhat-operators/openshift-marketplace/gitops-1.5/openshift-gitops-operator.v1.5.2 provide GitopsService (pipelines.openshift.io/v1alpha1), clusterserviceversion openshift-gitops-operator.v1.4.3 exists and is not referenced by a subscription, subscription openshift-gitops-operator exists, subscription openshift-gitops-operator requires at least one of redhat-operators/openshift-marketplace/gitops-1.5/openshift-gitops-operator.v1.5.2 or @existing/openshift-operators//openshift-gitops-operator.v1.4.2
  

  type: 'Warning' reason: 'ResolutionFailed' constraints not satisfiable: no operators found with name openshift-gitops-operator.v1.2.0 in channel gitops-1.5 of package openshift-gitops-operator in the catalog referenced by subscription openshift-gitops-operator, subscription openshift-gitops-operator exists