When doing a head or tail action from a list, Mendix automatically gives the object a ‘New’ prefix. To me this seems odd since it is not a New object. This is even more annoying when, in the same action, you actualy create a New object. Then the actual new object get’s an _2.
Suggestion here is to change the ‘New’ prefix to ‘Head’ or ‘Tail’ or don’t give the object an prefix at all.