Package: linux-headers-6.6.9-amd64 Version: 6.6.9-1+b1 Package "linux-headers-6.6.9-amd64" on sid has the following dependencies:
> Depends: linux-headers-6.6.9-common (= 6.6.9-1), linux-image-6.6.9-amd64 (= > 6.6.9-1+b1) | linux-image-6.6.9-amd64-unsigned (= 6.6.9-1+b1), > linux-kbuild-6.6.9, gcc-13 However, the package "linux-image-6.6.9-amd64" has only version "6.6.9-1" available, not "6.6.9-1+b1": > Package: linux-image-6.6.9-amd64 > Version: 6.6.9-1 This leads to the headers currently being uninstallable for 6.6.9 (signed). The headers can be installed together with the unsigned version, because that has the "b1" version available. The changelog for "linux-headers-6.6.9-amd64" does not list this "b1" version.