I'm building a store using the commerce kickstart drupal distribution and I'm a beginner with it, however do possess some alternative Drupal 7 experience. Now, I need to add a different product variation type but when I try to add one, I and I want to add a Images field to it, the default Machine name assigned it field_images and when I try to store my variation with this field, I get the message The machine-readable name is already in use. It must be unique. - Fair enough you would think, but if I go and check in the existing sample variation types, there's multiple existing variation types that use the exact same machine name, *field_images* this is, why is that? It puzzles me why I should not be able to do the same for a new variation type.