I think once the stem goes, it won't regrow until next year (provided the bulb is healthy). If you have concerns about the bulb, I would dig it up and store it until next year. I had some in a cardboard box from November until May(?) and had the biggest bulb bloom in the box without nary a drop of water. Amazing things. What zone do you live in? My mother in TN can't get rid of them no matter how many times they've been dug up and given away or tossed in the trash.

I had to move it outside when it started to stink up our garage that year.

March one month earlier

Well the "bulb" seemed okay after the top died, it all turned into baby food like mush after two weeks. Maybe I should have brought it inside and put in the basement cooler and dry. Or the rot was eventual, I don't know.

Maybe some baby tubers are in the ground and will appear next year. My mother has been fighting them for years. My son-in-law and grandson swore they dug to China to get all of the bulbs out a few years ago and yet more and more come up in the same spot. I say why fight it (other than the smelly blooms so close to the house if it blooms that year) and enjoy them.