Why does 'Automatically created by Cortex' appear on Team pages?

You will see "Automatically created by Cortex" appear on a Team's page if the YAML references a GitHub team, but that GitHub team doesn't have a corresponding entry within Cortex. In this case, Cortex automatically creates an entry within the "teams catalog." This indicates that Cortex detected a service that was created and owned by a team that does not exist within Cortex.