Can I install another webmin on same server?

No.

Because you installed Virtualmin 6. The module is not the installer.

The new installer has different dependencies. You should not switch to other repos for no reason and without understanding the differences.

We change major versions of the repositories so that we can break things without breaking your things. So…don’t switch without understanding what the differences are.

The virtual-server module is just the Webmin module. “Virtualmin” is the install script, all the packages, the repos, the yum groups, the virtualm-config settings, all the other modules, and a few other dependencies. All of those things change when major versions change. You running Virtualmin virtual-server module version 7.1 does not make your system the same as a Virtualmin 7 system (but you’ll have mostly all the same features, or the ability to enable/add them…just slightly different deps and defaults).

Edit: Also, stop changing the subject! This is chaotic. I can’t keep up. I’m done with this thread for tonight. Too much going on.