Promotion Paths
Each promotion level must be associated with a site. Promotion sites can be configured to allow simultaneous promotion to levels in more than one site, or you may be required to demote from a level in one site to promote to a level in another site.
These rules can be manipulated to provide multiple promotion paths for a package in an application.
Ask your administrator which promotion paths are available for packages in your application. Ask about the requirements for demoting from one site to promote to another.