I could not find a clear explanation on K2 Knowledge Center, how workflow versioning works in the new designer (K2 Five and/or K2 Cloud). I still receive some questions from my colleagues, therefore, I find it helpful to create a short article and explain all the details. However, you need to understand, that everything was tested on K2 Cloud Update 7 and K2 Five 5.2. K2 might change the behavior, which make the following article invalid. So let's go.