Shallow paste of sequence diagram not working

[RRushing]

We have generated numerous sequence diagrams with "linked" lifeline elements....when we select an existing sequence diagram, select "copy diagram", then select a new project folder and select "paste diagram" -> "shallow" option...we would expect that the diagram and it's sequence steps would be copied, but the lifeline elements would not be copied....(they would continue to be a link of an existing element)....when in fact the lifeline elements are also being copied....is this normal  

[qwerty]

Yes, that's correct. It does not copy the class but generates a new lifeline. A lifeline is only valid in the context of a single sequence diagram. Therefore a sequence diagram should always appear inside an Interaction in the according class.

q.