removing old hyperlink destination

Hi, need some help!

I realize the layout of some magazines with various rubrics after which I generate a PDF-UA. The new magazine issue is made by editing the previous magazine (InDesign file), which I use as a Template. In the new magzine, I delete the old articles, hyperlinks, bookmarks, etc.
For the TOC, because of the layout I make links from the TOC to the various headings. For this I set a hyperlink destination as a Text Anchor in the Hyperlinks menu with "New Hyperlinks Destination" for each rubric using the rubric name (e.g. "Editorial"). Then In TOC I make a hyperlink to that Text Anchor.
But not every issue of the magazine has the same rubric (e.g. "Editorial") always on the same page. And here is my problem.
If I want to generate a new Hyperlink destination with the same name InDesign gives me a message that this name is already used.
And I can't figure out where/how to delete it.
In the "Hyperlink Destination Options" menu I can't find anywhere a destination/link with the name "Editorial". I only find 3 types of links/destinations, Page, Text Anchor and URL.
How can I delete the old destination? Or what do I need to delete/edit/do so that I can reuse the name "Editorial" as a new destination?

Thanks for your help,
Dan