Hi @blobfish,
I reached out to some of the folks who know more about managing games on Twitch. They mentioned it looks like https://www.igdb.com/games/space-gladiators was recently added, but it was already on IGDB at https://www.igdb.com/games/space-gladiators-escaping-tartarus.
The duplication checks missed this, so the team is going to remove the newer one so you can claim and control the older entry via dev.twitch.tv/console.
Let me know if you have any questions. I hope this moves toward resolving the issue.