I have a sagging floor joist due to cut-out for plumbing. What are some ideas to correct this issue?

This joist is on the first floor with access through basement. I am looking for methods to correct the sag in the joist other than permanent floor jacks. Sistering another joist would not work because of the plumbing in place and if at all possible, prefer not to move this plumbing. This is an older home, 30-40 ears old. At this point, the sag doesn't appear to be getting worse but want to reinforce.