Welcome to the Jungle is a 2008 hardback graphic novel written by science fiction and fantasy author Jim Butcher and illustrated by Ardian Syaf. Set in the world of Butcher's contemporary fantasy/mystery novel series, "The Dresden Files", "Welcome to the Jungle" was written as a prequel to the first novel, "Storm Front". It was nominated for a Hugo Award in the Best Graphic Novel category.
"Storm Front" is a sequel to "Welcome to the Jungle," but was written before it.
My statement is definitely correct because it's the converse of what the context said.  I think I managed to fool the system with the use of the word "sequel," which the AI read as an antonym to "prequel" and perceived as contradictory, even though my sentence was still true.