Hi there,
the license of the aubio package has changed from GPLv2+ to GPLv3+ in versions 0.4.0 and later. This only affects Rawhide/F-24 and later as the changes in aubio-0.4.x are quite extensive and require a package to be built against the new version. Not many packages require aubio -- ardour2, ardour4, denemo -- and all of them have compatible licenses (GPLv2+, GPLv3+).
Nils