Hello Jim,
Quite honestly, I would not do it. But if you are desperate.....
What I would do in this case: very carefully dig beside the offset, best with bare hands in order to check if the offset has its own roots. If it does not or if you are not sure I would leave it on the mother plant. If the offset has its own roots you could cut the junction very carefully with a sharp knife in order not to injure one of the two bulbs and in order not to severe the roots. Then disentangle the roots of the offset to be able to lift it with as much intact roots as possible and replant immediately.
You could also dig up the whole lot but that would cause much root disturbance.
Good luck!
Quite honestly, I would not do it. But if you are desperate.....
What I would do in this case: very carefully dig beside the offset, best with bare hands in order to check if the offset has its own roots. If it does not or if you are not sure I would leave it on the mother plant. If the offset has its own roots you could cut the junction very carefully with a sharp knife in order not to injure one of the two bulbs and in order not to severe the roots. Then disentangle the roots of the offset to be able to lift it with as much intact roots as possible and replant immediately.
You could also dig up the whole lot but that would cause much root disturbance.
Good luck!