Installing an Old Distro

Is it possible to install old versions of the distro? or has this been disabled? I want to install an older version ( for testing purposes, but the install fails with “running your transaction for the following reason(s): file conflicts”. I can install the latest distro without any errors.

No at this time you can not. In the future we will try and make this doable but with RPM conflicts and such it is really tough.