Update Topics with New Snippets

[PharaohTet]

If your Realm has existing Topics, and you revise the basic Topic template by adding a new Snippet...

Is there a way to implement the new snippet into the pre-existing topics?

EXAMPLE:

I've created a few Individual topics. Later, I opt to add a snippet to the template to allow a field for selecting a Royal Title. After that, every new topic I create has the Royal Title option. But the pre-existing ones still don't?

Do I have to scrap the old ones and re-enter them? Or am I missing something obvious here?

YES, I'm a noob at this. And YES, I searched the forums first....

Thanx in advance!