The old flavors, after having been deleted, still exist in the instance_types table, so this isn't necessarily a problem.
However, if a flavor is deleted, then the instance based on that deleted flavor is migrated, the migration fails.
Should we be discussing a check to make sure a flavor isn't in use before deleting, or making it possible to use deleted flavors for existing instances?
The old flavors, after having been deleted, still exist in the instance_types table, so this isn't necessarily a problem.
However, if a flavor is deleted, then the instance based on that deleted flavor is migrated, the migration fails.
Should we be discussing a check to make sure a flavor isn't in use before deleting, or making it possible to use deleted flavors for existing instances?