when I tried to install mynewdomain.com on my shared hosting server using the addon domains within cpanel

I got the following error

Addon Domain Additions

There was a problem creating the addondomain. Show Details

Error from domain wrapper: Domain already exists, it was not added.: mynewdomain.myserverdomain.com

I didn’t quite understand what the complaint was about because it said Domain already exists

However this is a new domain that I was trying to install!

OK, here are the steps to troubleshoot

Check

Whether you have a subdomain with the same name already created?

You need to check within the /public_html folder (this is where you will have separate directories for all your sites hosted on the server)

Make sure that there is no other folder with the same name, it is common to have a folder with the same name if you have installed domains with the same name but with different extenstions. For example

mynewdomain.com

mynewdomain.net

if you are using the automated addon domain process which comes with cpanel then both domains would try to create the folder “mynewdomain” within /public_html and would give you an error when installing the second domain.

OK, so to avoid the problem you need to change the folder name for the new domain you are trying to install, then there will not be a clash of names within /public_html

OK so Next time if this happens it is possible to change the name of the subdomain

When adding the new domain , the 2nd option is to create the subdomain name.

If you are using cpanel this one is automatically populated with a folder name for your site in /public_html

That is creating the subdomain without clashes !.