So it turns out that Katello has to be installed before Foreman, which I didn’t knew.
I was in the process of setting up Foreman, so nothing more than a few hours of tinkering has been lost luckily.
But I want to remove Foreman, so I can install Katello.
What would be the easiest way to do a full uninstall? I am using RHEL.
I suggest to rebuild Operating System and then do clean install as required. This has been asked previously too,
While I agree this is confusing, the time hasn’t been lost, you learned along the way. We are working on improving our documentation.