UML 15 association and CompositeViolation

Hi,

When ceating UML 15 Associations and their AssociationEnd I encountered 
a problem I havent though about earlier.
When setting the namespace of both AssociationEnds to the same namespace 
as the Association I got a CompositeViolationException when attaching 
the Ends to their Association.

Is this the way is should be ?

/anders