I don't think there is a bug.
cups2 and cups3 are not compatible. In order to let the user decide when
to switch to cups3, there are two different sets of packages. One set
for cups2 and one set for cups3. The current package cups-filters in
version 1.x does belong to the first set and won't be upgraded to
version 2. The filter package for the cups3 set is libcupsfilters! This
package is not compatible with cups2 AND cups3 but as it contains a
compile switch, it can only work with cups2 OR cups3. So installing this
would break printing in Forky.
Thorsten
