The answer is pashut.
Deni (levi) is also dead. The issue is whether there was a zika back when he was alive. Who cares? Because deni (levi) had meanwhile married achos zekukaso and had kids and we want to know if they’re pagum.
So if you pay yorin (shimon) the loan, people will think he can be meyabeim kilonia (the yevama), and that that lmafrea nullifies the zika that deni (levi) had.