Remove an Entire Section of a Tree

Hello ... so, as part of a school project, my daughter Частный профиль added a whole section to our family tree. Don;t ask why ... I don't know! Since then I was able to merge her profile with the one I created when she was born. She added herself, me and my wife, my brother, my parents and grand parents, and aunts and uncles. I think there are ~13 duplicates. You can't delete from top down (obviously) and I can't delete her record ... even while logged into her account. But I don't know why. Any suggestions on why I can't delete her entry without deleting her account? Maybe that is the problem! Please let me know if you have any incite... thanks! This is my entry Частный профиль