VMビルド直後の Centos7.0 で yum update で Error: kernel conflicts

 Cloudatcost でVMビルド直後の Centos7.0 に ssh から yum update をかけた所、途中でsshが落ち、その後

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Error: kernel conflicts with kmod-14-9.el7.x86_64
Error: firewalld conflicts with 1:NetworkManager-0.9.9.1-13.git20140326.4dba720.el7.x86_64
Error: avahi-libs conflicts with avahi-0.6.31-20.el7.x86_64
Error: Package: avahi-libs-0.6.31-13.el7.x86_64 (@anaconda)
           Requires: avahi = 0.6.31-13.el7
           Removing: avahi-0.6.31-13.el7.x86_64 (@anaconda)
               avahi = 0.6.31-13.el7
           Updated By: avahi-0.6.31-20.el7.x86_64 (base)
               avahi = 0.6.31-20.el7
Error: initscripts conflicts with centos-release-7-0.1406.el7.centos.2.3.x86_64
 You could try using --skip-broken to work around the problem
** Found 176 pre-existing rpmdb problem(s), 'yum check' output follows:
ModemManager-glib-1.6.10-3.el7_6.x86_64 is a duplicate with ModemManager-glib-1.1.0-6.git20130913.el7.x86_64
1:NetworkManager-1.18.4-3.el7.x86_64 is a duplicate with 1:NetworkManager-0.9.9.1-13.git20140326.4dba720.el7.x86_64
1:NetworkManager-libnm-1.18.4-3.el7.x86_64 has installed conflicts NetworkManager-glib < ('1', '1.18.4', '3.el7'): 1:NetworkManager-glib-0.9.9.1-13.git20140326.4dba720.el7.x86_64

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なエラーが出て、再構築するはめに
ビルドし直した後、コンソールから yum update を行うことでうまくいったのだが...