For this reason, blockchains are not used that way - it does not track ownership of physical objects, it tracks ownerships of digital ones. If the blockchain says you own the only digital edition that Beeple created for his artwork, then this is so, because the blockchain states this.

If Beeple creates another NFT referring to the same work, then he is simply creating a second edition, in the same way that an artist can create a run of prints limited to 10, and later decide to create 10 further prints.

If someone else creates an NFT claiming to represent Beeples work, then this is like me selling my own unauthorized Robert Rauschenberg print, which I might find difficult to find a buyer for, though with enough talent, maybe not impossible.

In any case, the NFT is merely a digital equivalent of a print.