My first addon says "Duplicate add-on ID found"

I was trying to upload a new extension which ID is nuist-vpn@qwertycxz.top. The linter found some of my issue of this extension. After fixing that, I tried to upload again, but AMO said that my extension has a duplicate ID. How could I fix it? Thank you!

Hi there! You need to edit your manifest and change the gecko name of your addon to something else.

Thank you

Must I change the ID? The addon has not published to anywhere.

Thank you!