Will adding new baby erase first baby

Aisha • 27. Navy Wife. Mother.

I have a 15 month old I used the Glow <a href="https://play.google.com/store/apps/details?id=com.glow.android.baby">Baby app</a> for. I literally just had my second 2 hours ago and want to add him. If I add him will it erase the first baby’s info.