idtibaa'

Forgetting to make idtibaa' in the tawaaf of Umrah

Q: Alhamdulillah, I performed Umrah this week. After performing tawaaf and before performing the waajib-ut-tawaaf salaah, I realized that I forgot to open my right shoulder while performing tawaaf. However, I completed the remainder of the Umrah.

What is the ruling if I forgot to open my right shoulder while performing the tawaaf? Should I sacrifice a goat as damm?