What is the safest way to renumber all the people in my current data set? When I was in TMG beginner mode, I started with myself at #1, my father at #2, my mother at #3, my maternal grandfather at #4, and my maternal grandmother at #5. Since I was new to TMG, I did not bother with trying to change the order of the ID numbers. Now, I would like to renumber the people in my data set, starting with my maternal grandfather -- because this particular data set is actually about him, his descendents, and some of his ancestors. I want to start with my grandfather at #1, his wife (my grandmother) at #2, and then his children (my mother, aunts, and uncles) from #3 to #9.