Looks like Foreman 2.3.0 rc-1 to rc-2 update failed.
Below are some output lines of command $ foreman-installer
Executing: foreman-rake upgrade:run
-=============================================
Upgrade Step 1/3: katello:correct_repositories. This may take a long while.
Failed upgrade task: katello:correct_repositories, see logs for more information.
-=============================================
Upgrade Step 2/3: katello:correct_puppet_environments. This may take a long while.
Failed upgrade task: katello:correct_puppet_environments, see logs for more information.
-=============================================
Upgrade Step 3/3: katello:clean_backend_objects. This may take a long while.
Failed upgrade task: katello:clean_backend_objects, see logs for more information.
Success!
- Foreman is running at https://i18nqe-vm010.lab.eng.pnq.redhat.com
- Foreman Proxy is running at https://i18nqe-vm010.lab.eng.pnq.redhat.com:8443
The full log is at /var/log/foreman-installer/foreman.log
2020-11-24 22:30:50 [NOTICE] [post] All hooks in group post finished