The compose tools get tripped up on the name of this and think that "PackageKit-debuginfo-install" is actually a debuginfo package, and it gets put in the debuginfo repo. This is because we have some packages with names like "foo-debuginfo-common" and then various sub-debuginfo packages thereof, so just searching for packages that end in -debuginfo won't work. We could work harder on a regex to avoid the PackageKit package, but I wanted to start with a request to rename the subpackage.
Sure, fine with me. If you rename the subpackage in PackageKit.spec, just ensure you obsolete the old PackageKit-debuginfo-install subpackage too.
Ok, I've done it.