RHEVM upgrade fails with the error : "Error: Installed packages are missing from the yum repositories Please check your yum repositories or use --no-yum-rollback "

Issue

RHEVM upgrade fails with the error : "Error: Installed packages are missing from the yum repositories Please check your yum repositories or use --no-yum-rollback "

# rhevm-upgrade

Checking for updates... (This may take several minutes)...[ DONE ]
10 Updates available:
 * rhevm-3.2.6-0.50.el6ev.noarch
 * rhevm-backend-3.2.6-0.50.el6ev.noarch
 * rhevm-config-3.2.6-0.50.el6ev.noarch
 * rhevm-dbscripts-3.2.6-0.50.el6ev.noarch
 * rhevm-genericapi-3.2.6-0.50.el6ev.noarch
 * rhevm-notification-service-3.2.6-0.50.el6ev.noarch
 * rhevm-restapi-3.2.6-0.50.el6ev.noarch
 * rhevm-tools-common-3.2.6-0.50.el6ev.noarch
 * rhevm-userportal-3.2.6-0.50.el6ev.noarch
 * rhevm-webadmin-portal-3.2.6-0.50.el6ev.noarch
Error: Installed packages are missing from the yum repositories
Please check your yum repositories or use --no-yum-rollback
Error: Upgrade failed.
please check log at /var/log/ovirt-engine/ovirt-engine-upgrade_2014_04_03_19_10_04.log
Starting ovirt-engine service...                     [ DONE ]

Following errors are seen in ovirt-engine-upgrade.logs:

2014-04-03 19:10:06::DEBUG::rhevm-upgrade::1364::root:: Error: Installed packages are missing from the yum repositories
Please check your yum repositories or use --no-yum-rollback
2014-04-03 19:10:06::INFO::common_utils::349::root:: YUM: OK:   Performing yum transaction rollback