I had to do that once. I began collaborating with someone who was connected by marriage to a large branch of the family in Israel. After the initial merges, that person decided they no longer wanted to collaborate, leaving me with many incomplete merges. The best thing to do was undo the connection.
You need to contact geni support. Have them cut the connection that you do not want. You will then need to re-add the person who is missing.
John Hoge Walker would no longer be the father of
Mary Jane Calvert (Walker)
Mary Jane Walker
I couldn't do it through Relationships. I will contact Geni support. Thanks, Harold.
Geni has 'divorced' John Hoge Walker and Mary ... Clavert (Walker)
Susan, It's been nice to be related to you if only for a short while,
[#OJU-470145]: Removing John Hoge Walker from Linda Rodd's Tree
Per your request, I have removed John Walker/6000000001827699056 from the branch with Mary Walker/6000000001207273509. However, I have left Mary Walker/6000000001207273509 as the mother of Mary Jane Calvert/6000000001207422050/ Please feel free to get back to me if this is not correct.
Thank you for using Geni,
The Geni Team