Her reputation underwrites the transaction; any transaction contributes to her reputation.
It's probably even truer for NFTs as often the NFT itself merely represents a JSON payload which itself references URLs managed by a third party and trusted to continue referencing the original work. Once that third party goes away, the reference chain breaks. The value is not only reliant on everyone agreeing that the third party "owns" (whatever this might mean) the "work" (whatever that might be) but also that the NFT continues to represent this ownership by proxy even when the proxy goes away.
There's nothing stopping a new middleman claiming authority over the ownership of a work and issuing an NFT for it. But its value entirely hinges on a shared understanding that this claim is valid.
Of course this would break down if an artist really did devalue earlier NFTs for the same work by issuing new ones because the value largely comes from the expectation that the non-fungible token's authority is also non-fungible, i.e. permanent.
I don't think re-recording albums for the purpose of attacking former business partners, who priced the intellectual property at roughly all the money that she had been paid in their previous arrangement, indicates a willingness to keep re-recording things.