User blog comment:Martialmaniac/Sources external to the manga and Nen types/@comment-32818639-20190917190656/@comment-5780397-20190918113453

I think that has more to do with the inconsistencies. Hisoka's height turned out to be incorrect, Gon's birthday is inconsistent with his stated age, Maha might be Zzigg and his databook age was incorrect, Milluki's date of borth was changed, Nobunaga talks about Enhancers as if they were something apart from himself but is classed as one such in the guides, Porcupine's ability uses no Transmutation... I do get some of the concerns. The only instance that comes to mind of info from the databook which later comes up in the manga without being contradicted is Gon's blood type.