The default GCN (global catalog namespace) has been changed from OLM’s namespace, openshift-operator-lifecycle-manager, to operator-marketplace. As a quick refresher, the GCN is a special namespace that contains operator catalogs that can be subscribed to from any namespace in the cluster. The important positive implication of this change is that default catalogs in the operator-marketplace namespace (redhat-operators, certified-operators, etc…) can be subscribed to from all namespaces without further configuration. The negative implication is that any subscriptions to catalogs in the openshift-operator-lifecycle-manager namespace must be co-located in that namespace.