For those who (like me) didn't get the reference, the "Ship of Theseus" is a thought problem about whether, if every part of the ship has individually been replaced, it remains the Ship of Theseus.
It's the same thought problem, because thought problems don't have to be embodied in anyone and it hasn't significantly changed.
Also it's not the same actual thoughts across people, and basically never was.
So there's nothing in here that's been slowly replaced piece by piece. The paradox does not apply to itself.