In my repository (https://github.com/bitwiseman/hermann), I went to edit an existing pipeline in the branch "blog/declarative/html".
In this pipeline I have the following:
I then saved that pipeline to the branch issue/blue-ocean-editor/html .
On save, the editor converted that to:
When I try to edit that converted pipeline again, I get the error shown in the attached screenshot and cannot edit the pipeline anymore.