material groups are linked with another, how can I unlink them from another? First I will describe what I have done:


In node editor, I added material nodes
I selected material nodes and grouped it
I duplicated the group
Then I edited one of them


However, when I edited the duplicated group, the same edits and the same modifications were applied to the original group too.

My question: why is this and how can I unlink them?
Click that number next to the group name: