[CentOS] Centos 3 - yum update error (rpm-libs)

[thorsten at uni.de]

ok,

but how do I reinstall rpm-4.2.3-13.WB2.i386.rpm  with  rpm-4.2.3-21_nonptl.i386.rpm?

When I do a 'rpm -e rpm' I can't install rpm's anymore. 
When I do a 'rpm -Uhv --force rpm-4.2.3-21_nonptl.i386.rpm' I have duplicate rpm-rpms.

cheers,
Thorsten