leapp fails when upgraded from RHEL 8.8 to RHEL 9 with Unable to install RHEL 9 userspace packages.

Issue

When upgrading from RHEL 8.8 to RHEL 9, leapp fails with:

2024-09-05 12:52:35.345935 [ERROR] Actor: target_userspace_creator
Message: Unable to install RHEL 9 userspace packages.
Summary:
    Details: Command ['systemd-nspawn', '--register=no', '--quiet', '--keep-unit', '--capability=all', '-D', '/var/lib/leapp/scratch/mounts/root_/system_overlay', '--setenv=LEAPP_HOSTNAME=r8.lan', '--setenv=LEAPP_EXPERIMENTAL=0', '--setenv=LEAPP_UNSUPPORTED=0', '--setenv=LEAPP_NO_RHSM=0', '--setenv=LEAPP_UPGRADE_PATH_TARGET_RELEASE=9.2', '--setenv=LEAPP_UPGRADE_PATH_FLAVOUR=default', '--setenv=LEAPP_IPU_IN_PROGRESS=8to9', '--setenv=LEAPP_EXECUTION_ID=aa29e8fa-452e-4dfe-8710-4b9ba32e9278', '--setenv=LEAPP_COMMON_TOOLS=:/etc/leapp/repos.d/system_upgrade/common/tools:/etc/leapp/repos.d/system_upgrade/el8toel9/tools', '--setenv=LEAPP_COMMON_FILES=:/etc/leapp/repos.d/system_upgrade/common/files:/etc/leapp/repos.d/system_upgrade/el8toel9/files', 'dnf', 'install', '-y', '--setopt=module_platform_id=platform:el9', '--setopt=keepcache=1', '--releasever', '9.2', '--installroot', '/el9target', '--disablerepo', '*', '--enablerepo', 'rhel-9-for-x86_64-appstream-eus-rpms', '--enablerepo', 'rhel-9-for-x86_64-appstream-rpms', '--enablerepo', 'rhel-9-for-x86_64-baseos-rpms', 'dnf-command(config-manager)', 'dnf'] failed with exit code 1.
    Stderr: Host and machine ids are equal (1d4dfab59097458ab70b07793b746904): refusing to link journals
            Errors during downloading metadata for repository 'rhel-9-for-x86_64-appstream-eus-rpms':
              - Status code: 404 for https://cdn.redhat.com/content/eus/rhel9/8.8/x86_64/appstream/os/repodata/repomd.xml (IP: 23.13.176.251)
            Error: Failed to download metadata for repo 'rhel-9-for-x86_64-appstream-eus-rpms': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried