No, the NFTs are a separate thing which apparently has some sort of sentimental value. The digital artwork is still whatever it was before. I could sell an NFT for my cuckoo clock. It has nothing to do with my cuckoo clock.
It's akin to a certificate of authenticity for a numbered print in a series. Anyone can make another copy of the print, and it doesn't really matter which copy a certificate goes with, but without the certificate the print is worthless.