repodata provided by Red Hat Network for Red Hat Enterprise Linux 5.4 contains non existent package

Issue

• Non-existing package in repodata.

• Updating Red Hat Enterprise Linux 5.4 via RHN would result in invalid repodata (comps.xml). This results in displaying "Development Tools" as "Available Groups" rather than ""Installed Groups", although "Development Tools" is already selected during installation from ISO image.

  # yum grouplist
  [...]
  Loaded plugins: aliases, changelog, downloadonly, fastestmirror, filter-data,
                : keys, kmod, list-data, protect-packages, protectbase, rhnplugin,
                : security, tmprepo, verify, versionlock
  Setting up Group Process
  Installed Groups:
     Administration Tools
  [...]
     X Window System
  Available Groups:
     Development Tools 
  Done