update the due date

I had a miscarriage in October that I tracked on my glow nurture app as a period and marked "healing from a loss" as my status, I had a short, light- two day period in November and I tested positive for pregnancy yesterday. I'm trying to update the profile to now reflect "pregnant" but it keeps giving me this particular pop-up and won't let me update my profile to pregnant. I'm not sure how to fix this but I'd really like to track this pregnancy. Does anyone know how to get around this or fix this?