Posted: 2006-11-03T14:21:43-07:00
Unknown tags can generally be safely ignored. It just means it contains metadata that is not in a well-known format. Some companies inject metadata for there own use.
Use https://github.com/ImageMagick/ImageMagick/discussions instead.
https://imagemagick.com/discourse-server/
https://imagemagick.com/discourse-server/viewtopic.php?t=7722