Reference position problem, see https://fr.wikipedia.org/w/index.php?title=Jean-Christophe_Portes&diff=144964123&oldid=131382664. One ref was added outside the tag. Normally I can't add a auto generated ref outside the appropriate <ref> tag ?
Topic on VisualEditor/Feedback
Normally you can't add an auto-generated ref outside of ref tags. I believe that the old work-around is not currently functional. You could switch to the wikitext mode to make that change.