Error: URI already taken

Question

I've got a content type for team members but whenever I try to add one it gives me an error saying "the URI 'team' has already been taken".

I assume the URI is made from the slug, which is where I get the error. The title of the team members is made automatically from the first name and last name.

And even when I type in the slug myself it keeps giving the same error. What's weird is that I was able to create one team member successfully but it started failing afterwards.

URI error:

Title settings:

Answer 1

(I'm writing this in case someone comes across the same problem)

As @MatsMikkelRummelhoff pointed out, I still had to change the URL's format settings to team/{slug}