Package upgrade fails with "Failed: packages requested raised dependency problems: [u'package1-version.release.arch requires package2 = version']" (code 18)"

Issue

• When trying to upgrade the php packages, the system shows the error below

This action's status is: Failed.
The client picked up this action on 2014-03-09 06:12:00 PDT.
The client completed this action on 2014-03-09 06:12:02 PDT.
Client execution returned "Failed: packages requested raised dependency 
   problems: [u'php-process-5.3.3-14.el6_3.x86_64 requires php-common = 5.3.3-14.el6_3']" (code 18)

• Yum fails to solve dependencies when trying to upgrade php packages.

• Trying to upgrade libsss package fails with,

Client execution returned "Failed: packages requested raised dependency 
       problems: [u'libsss_sudo-1.9.2-129.el6.x86_64 requires sssd = 1.9.2-129.el6']" (code 18)