Pagination; changed post slug, now getting a page 2 error

Hi, I updated my WordPress theme so that my news posts would get the slug “news” in front of them (

And I think this is now causing an error with the pagination, in that when I click to go to the second page of news posts, I get a 404 error.

I presume I need to update this link somewhere, but can’t find where, could anybody help advise where I should be updating this?