How to remove erroneous keywords from a bunch of images?

You can remove the keyword from all Images. Go to the Keyword HUD, and delete the keyword. Use the search field to find the keyword if you don't see it.

You can change any keyword. The change will show in each Image tagged with the Keyword. Double-click the keyword in the Keyword HUD, change it. This is excellent for misspellings, or for removing spaces from keywords, etc. (Note that the keyword is NOT changed on a Control Bar Button. You must do this manually -- and you should, or the now defunct keyword will persist and cause confusion. {Imho, a bug.} )

(Added:)

You can remove any keyword from selected Images by holding "{Shift}" when applying the keyword. So you could filter for the "erroneous" keyword, select all Image, start typing the keyword in the Add Keyword field of the Control Bar, and once auto-fill has selected the keyword, hold "{Shift}" and type "{Enter}".

There are some refinements to all this. Post more if this doesn't lead to a solution to your problem.

Message was edited by: Kirby Krieger

Nope 😀 .

The search field in the Keyword HUD is only for finding keywords in the Keyword HUD.

Use theAdd Keyword field on the Control Bar.

This page in the User Manual provides full instructions:

Removing Keywords from an Image(←link)