Technically it would just mean that at least the reviewers were convinced it was important work which should get looked at by the rest of the field, i.e. worth publishing. I'm not saying it isn't. I'm just saying that even things which get published in major publications like Cell don't always hold up, and a major revision of the understanding prior to that article is probably more likely than most to be a case of that.

Although, for my part, I find it entirely plausible that if sapiens interbred with neanderthals in Europe, some of that found its way back into Africa. But it is not a major miss of some sort in the parent article to not take that as demonstrated yet.