Setup will not be able to rollback new packages in case of a failure, because the following installed packages were not found in enabled repositories:

python-websockify-0.5.1-1.el6.noarch

I checked on the Epel repository, and version of the package indicated there isn't.
There is only the version python-websockify-0.6.0-3.el6.noarch.rpm
How can I do if I need the rollback?

Massimo