I have run into this same error. Going out and then starting over worked, however it would have been much better to just be able to correct the name... especially after I had added all of the specific people and positions...
Also, the error message is not descriptive to point to the true way to address it. It just states that it must be unique but there is nothing readily available and accessible to let the person know who is setting things up that they should not use special characters, that they will have to back out and start over, etc.
I just think that it would be more used if it was easier on people.
Also, it is a bit of a pain to have to add people one by one to view and/or view/edit... is there not some sort of bulk select that can be built?
Thanks, so much. I love the tool!