The certification for the Unisys ES7000/one (https://hardware.redhat.com/hwcert/show.cgi?id=186965) shows it is a parent of https://hardware.redhat.com/hwcert/show.cgi?id=187234, however that is not a hardware certification bug. Parent/children relationships should probably only be listed if both are hardware certification bugs.
this should be fixed with the last update to the hardware catalog; re-open if this is still a problem.