So what we need is to move the files and adjust Breaks for this grub2-unsigned version and for unsignable targets, the version of the grub2 upload.
Then we should add Breaks from the grub2-unsigned package so that they also force an upgrade of the old version.
So what we need is to move the files and adjust Breaks for this grub2-unsigned version and for unsignable targets, the version of the grub2 upload.
Then we should add Breaks from the grub2-unsigned package so that they also force an upgrade of the old version.