How do I change only the ending (add-on) of several ad names at once?

In Meta Ads, on the Ads tab:

1. Turn on Bulk edits and select the ads.
2. Open the name editor.
3. In the Change add-on only box, type the New add-on and click Apply.

It keeps the beginning of each name and replaces everything after the first " - ". Example: "VID01 - Black Friday" with the add-on "Christmas" becomes "VID01 - Christmas". Leaving the field empty removes the add-on. Click Save to apply the changes: the new names show up in the table right away.