I'm busy doing the free lessons and managed to break the movie graph database at the point "Creating More Relationships". Is there any way to get it in a working state again?
Welcome @johannesdreyer to the Neo4j Community.
If you sign out of the course and sign back it, then go to that lesson, it should reset the sandbox to where it should be at the beginning of the challenge.
Let us know if that does not work for you.