im having an issue with aperture.  its trying to add keywords to my keywords HUD but the keywords dont exist anymore in any photos.    ive locked the keyword HUD because aperture kept adding the old keywords back into the HUD. ive rebuilt the database and repaired permissions etc. im on the latest version of aperture.

screen shot - https://www.dropbox.com/s/mmr3cn3zddtra49/aperture%20keywords%20issue.jpg

this is very annoying as this dialog box keeps coming up. can anyone advise what might be going on here? how can i stop this?

thanks