R2190 was due to another Use case diagram. I deleted the diagram but it'd kept the generalization link ?!
A diagram is a just a view of existing model elements. If you delete a diagram, the model elements are not deleted.You have to delete the duplicated links. If the inheritance links disappear from your existing diagram, you can unmask them again by drag&drop or by using the command Unmask/Parent generalizations (or Unmask/Child generalizations)
Let us know if it helps.
