Delete a cycle?

Catherine
I used Glow to become pregnant, then switched to <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">Nurture</a>, then after giving birth switched back to Glow. But Glow now thinks the year I was pregnant and postpartum with no period was one long cycle of 372 days, so it messes up my average cycle length and now I don't trust its predictions. How do I delete that long cycle and reset?