constrain creation of IntraRelationships to RELATIONSHIP

org.framed.iorm.ui/modules/relationship/intra_relationship_constraints/AbstractIntraRelationshipConstraintPattern.java

@@ -155,11 +155,12 @@ public abstract class AbstractIntraRelationshipConstraintPattern extends FRaMEDS
 	@Override
 	public boolean canCreate(ICreateContext createContext) {
 		Connection targetConnection = createContext.getTargetConnection();
-		if(targetConnection != null &&
-		   getBusinessObjectForPictogramElement(targetConnection) instanceof Relation) {
-			Relation relation = (Relation) getBusinessObjectForPictogramElement(targetConnection);
+		if(targetConnection != null) {
+			Object m = getBusinessObjectForPictogramElement(targetConnection);
+			if(m instanceof Relation && ((Relation) m).getType() == Type.RELATIONSHIP) { //TODO: Create EditPolicy rule for this case
 				return EditPolicyService.getHandler(this.getDiagram()).canCreate(createContext, this.getModelType());
 			}
+		}
 	    return false;
 	}