I am repotting a Sharry Baby/Sweet Fragrance into s/h. It has lots of new root growth, white and some with green tips, some without green tips. The older growth, however, has brown roots. They do not seem entirely hollow but I don't know if they are viable.

If not viable, I will cut them off but some are tangled with the new roots. It must be hard to get all of them untangled and cut without harming the new white roots.