Need to change sentry server's default project

This project cannot be removed. It is used internally by the Sentry server.

I can see this under one of my project’s setting. This seems to be getting used by sentry server to capture all the error raise by sentry itself.
I want to create a new project to collect sentry errors. Is there is where I can update the project name or the DSN key?
Setup details:

Sentry on-premise
Sentry docker version: 9.1.1

Anything on this?