i have a very special questions:
(1) If i have a concept "MyConcept" with a boolean property mybool
(2) and there are already instances of MyConcept in some solutions
(3) and i remove the mybool property in the MyConcept
then instances of MyConcept in the solution get red underlined with the message saying "Error: undeclared property mybool"
How can i avoid that - or automatically refactor it in a way, that the mybool gets deleted in the instances ?