Well, just like how conclusive carbon dating of the shroud of Turin to the medieval period completely eliminated the throngs of faithful who believed in its miraculous origins
Or how the discovery of the Tomb of Jesus, which would appear to completely invalidate the ressurection and divine origin of Jesus, caused Christian worldwide to renounce their faith.
The faithful will continue to believe, regardless of the scientific evidence. And in this case, as the summary itself mentions, there's a perfect reasonable explanation for the date - the parchment could have been an older parchment that was re-used, which happened often enough in that time period. This will change nothing.