Validation of Operator Upgrade Scenario

While trying to install the Pipelines operator v1.7 after a successful upgrade test for Gitops operator (starting from GitOps v1.4.11 all the way upto v1.6 by switching the channels along the way), an error showed up:

a unique replacement chain within a channel is required to determine the relative order between channel entries, but 2 replacement chains were found in channel "gitops-1.6" of package "openshift-gitops-operator": openshift-gitops-operator.v1.5.4...openshift-gitops-operator.v1.5.2, openshift-gitops-operator.v1.6.0

This is trivial as the error goes away and operator gets installed eventually. Further investigation:

This is the point where the error is coming from
https://github.com/operator-framework/operator-lifecycle-manager/blob/67177c0c822f[…]262c6b4f54bebad17f/pkg/controller/registry/resolver/resolver.go
Looks like OLM validates the above logic for all the operators together.

Steps to Reproduce

1. Install Pipeline operator on OCP 4.10 (Not sure about other versions)
2. Install GitOps v1.4.11 by subscribing to gitops-1.4 channel
3. Upgrade the operator to 1.5.z by switching the channel to gitops-1.5 and then to v1.6.0 by subscribing to gitops-1.6