If no other minor versions of an environment template exist, delete a major version of the environment template if it's not the Recommended version. Delete the Recommended version of the environment template if no other major versions or minor versions of the environment template exist. A major version of an environment template is a version that's not backward compatible.

Delete a minor version of an environment template if it isn't the Recommended version. Delete a Recommended minor version of the environment template if no other minor versions of the environment template exist. A minor version of an environment template is a version that's backward compatible.