I'm new to Alfresco and I have been trying out some of its basic features to get a feel for it. I have created two users one for myself and another example user I can use to simulate document sharing. I've noticed that if I edit a shared document on a site and upload(or check in) it creates a new version as I expect. However when I start a workflow to have another user review and approve the document, it automatically creates a new version with no comment. Why is this/ is there any way to prevent this?