If you mean that the wrong fields are displayed, you may change those fields. Go to the Administrator Console -> Presentation -> Search. Open the item (in this case, person). The first field in the Search tab is a list of the fields to display with Quick View.
If you mean the wrong data is displayed in those fields, then it might help to explain in what way it is wrong. Is it showing data for persons, but the wrong person? Is it showing data that does not even correspond to persons? etc.