[CentOS] built kernel-3.10.0-229.7.2.el7 OK but install fails

Hi all -
First the boilerplate:
On centos-release.x86_64                  7-0.1406.el7.centos.2.3
[root at localhost x86_64]# uname -a
Linux localhost.localdomain 3.10.0-123.el7.x86_64 #1 SMP Mon Jun 30
12:09:22 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
[root at localhost x86_64]# rpm -qa kernel\* | sort
kernel-3.10.0-123.el7.x86_64
kernel-devel-3.10.0-123.el7.x86_64
kernel-headers-3.10.0-123.el7.x86_64
kernel-tools-3.10.0-123.el7.x86_64
kernel-tools-libs-3.10.0-123.el7.x86_64

I built kernel-3.10.0-229.7.2.el7, successfully to appearances. But on
installing the new rpms I receive a couple dozen messages like these:
[root at localhost x86_64]# rpm -ivh kernel-*.rpm
Preparing...                          #################################
[100%]
    file /usr/lib64/libcpupower.so.0.0.0 from install of
kernel-tools-libs-3.10.0-229.7.2.el7.centos.local.x86_64 conflicts with
file from package kernel-tools-libs-3.10.0-123.el7.x86_64
    file /usr/bin/cpupower from install of
kernel-tools-3.10.0-229.7.2.el7.centos.local.x86_64 conflicts with file
from package kernel-tools-3.10.0-123.el7.x86_64

Have I missed a step? Maybe something specific to 7 or different from 6?
Thanks.....Nick