In case you have not yet installed these packages, you better wait until this has been clarified (so far, a safe and easy method for reverting to the precedent version has not been mentioned). It is not yet clear whether the culprit is one of the cups packages themselves, or one of the other packages of that batch.
PS: a workaround for downgrading to the previous situation now exists; quoting from the mageia discuss list:
Or actually just downgrade qpdf, cups itself is fine:
urpmi --searchmedia "Release" --downgrade lib64qpdf17
(if you have qpdf, qpdf-doc or lib64qpdf-devel installed, downgrade
those too for consistency)