AVAILABLE FROM 19.0 SP1

When migrating existing projects into a newer version of the modeling tool, you will see an informative message dialog asking you about your existing model's {sufficient} constraints.

This message dialog appears when opening your existing project in the newer version.

Informative message dialog about your existing model's sufficient constraints. 

If you click Yes, then the Notification Window will show you which elements have the Necessary and Sufficient stereotype applied to them.

Notification Window showing which elements have the Necessary and Sufficient stereotype.

If you click No, then the Notification Window will show you the following warning message shown in the next figure. 

Notification Window saying that the Necessary and Sufficient stereotype is not applied and warning that it may cause problems.