View of quizzes - lesson state - multiple results per quiz

Hi. We are trying to build a views block for the user dashboard which contains a list of quizzes of a course (we only have one). This works fine with the title fields. What we need is the lesson state of each quiz in our view. After adding the Lesson Results: Lesson State field we get duplicate entries of the same quiz with different states displayed. How ca we achieve to only get the current state of each quiz filtered by the current user which is logged in? Any ideas about that? Thanks!