GPG key error when updating RHEL 5.x system

when running a `yum update -y`, i got:

--
warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID 897da07a


Public key for nash-5.1.19.6-71.el5.i386.rpm is not installed
--


I had to install:

rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-beta

then run again.


also, check this:

rpm -qa |grep gpg

if you have multiple of the same gpg keys installed use the following:

rpm -e --allmatches gpg-pubkey*
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-beta