How to delete a person tag from drop down.

Hi!

I am new to Photoshop elements organizer and having some trouble with removing a wrongly created person tag.

By accident I created a new person tag "Lizanne":

But I only want to use "Lizanne Voogt"

When I go to people I can drag-and-drop "Lizanne" onto "Lizanne Voogt" and the person tags will be merged.

But when I tag another picture and start typing "Lizanne" is still shown in the drop down list:

How do I make sure "Lizanne" doesn't appear in the drop down menu when I create a new person tag?

Thanks for your help!