The GPG keys listed for the "Extra Packages for Enterprise Linux 5 - x86_64" repository are already installed but they are not correct for this package.
Check that the correct key URLs are configured for this repository.

置换PM-GPG-KEY

[root@HM-174 rpm-gpg]# rpm --import https://www.atomicorp.com/RPM-GPG-KEY.atomicorp.txt
修改/etc/yum.repos.d/epel.repo文件，变换变量

The GPG keys listed not correct