I noticed that there are two spellings of Jean-Michel Jarre in Roon: one with hyphen and one without. The one without hyphen has a bio, the one with hyphen has not.
The official spelling is with hyphen, at least that’s how he puts his name on his website. http://jeanmicheljarre.com/home
OK, that makes things more complicated. But in the end, all links should lead to the very same artist entry. Make it Jean-Micheal Jarre aka Jean Michel Jarre. Or the other way round.