Initial CWP Integration Setup

Hi!
I'm new here. I activated CWP PRO on my server, and I really need your help.

Before installing CWP, I already had a server with a basic configuration applied: main domain, mysql, Nginx web server and php.

When I installed the panel, I didn't understand how to point all the settings already made to the CWP. I want to do all the management there, but I can't.

Not even the first user could be created. I get an error message saying the hostname already exists.

Could someone guide me how to make the CWP PRO recognize the server settings and apply it as the panel default?

Thank you for your attention!

if you have read the cwp installation instructions they clearly say it needs to be a clean system without anything else installed!

Actually, I haven't consulted the official installation instructions document.

So there is no way to solve this?

If there is no solution, is there any way to uninstall CWP

Thanks for the answer!