It does not seem to be possible to change the name of an existing pipeline anywhere in GoCD. As simple as it sounds, is there any way to rename a GoCD pipeline that doesn't require a long series of actions in the UI?
The only way I was able to rename a pipeline is to clone it under a new name and then delete the old one. But deleting a pipeline also isn't straight-forward because is not possible to remove a pipeline that still belongs to some environment. Therefore, I first had to remove the pipeline from all environments and only then I was able to delete it.
There are some similar discussions about renaming pipelines here and there but since they are like five years old I thought a simple pipeline rename must somehow be supported in the meantime...
You'll have to change the pipeline name inside the Config XML. To get there, go to: Admin -> Config XML. You'll need to change this in two places on the config.