Name of project in project list is in two parts

The home screen lists the various projects. You can click on a project to open it.

Sometimes I see a name in in the list in this format: name1 | name2. There is a vertical line between the two parts.

Where does that second part come from? How do I change it or get rid of it? I have not been able to find a place to do that or anything about this in the documentation.

It doesn't seem to come from the project tab. It may be a vestige of a folder name where I had previously saved the show. But I would still like to get rid of it.