Yum が "Transaction Check Error: package package_name-version.x86_64 (which is newer than package_name-version.i686) is already installed" エラーで失敗する

Issue

• yum update が失敗し、以下が表示されます。

  Transaction Check Error: package package_name-version.x86_64 (which is newer than package_name-version.i686) is already installed
  

• yum update で以下のエラーが出力される理由とその解決方法を教えてください。

  package keyutils-libs-1.4-4.el6.x86_64 (which is newer than keyutils-libs-1.4-1.el6.i686) is already installed
  package libstdc++-4.4.7-3.el6.x86_64 (which is newer than libstdc++-4.4.4-13.el6.i686) is already installed
  package openldap-2.4.23-31.el6.x86_64 (which is newer than openldap-2.4.19-15.el6.i686) is already installed
  package krb5-libs-1.10.3-10.el6.x86_64 (which is newer than krb5-libs-1.8.2-3.el6.i686) is already installed
  package openssl-1.0.0-27.el6.x86_64 (which is newer than openssl-1.0.0-4.el6.i686) is already installed
  package libselinux-2.0.94-5.3.el6.x86_64 (which is newer than libselinux-2.0.94-2.el6.i686) is already installed