I ended up creating a new branch and then cherrypicking the changesets on by one. Also tried "cherrypick from this branch" but it also brough in the changes from the parent branch. I though of substractive merge but it didn't show up in the context menu.
Hi, How can I do a branch rebase? Better explained with this image: I have read about switchbranchbase command but it doesn't seem to exist in plastic8. https://stackoverflow.com/questions/19237370/in-plasticscm-how-can-i-reparent-a-branch