Dear Maintainer,

The Bootloader-sets-root field was renamed to Bootloader-Sets-Root in
https://salsa.debian.org/installer-team/flash-kernel/-/commit/343eeb3f642c3f4b4cc4ec6591bfa3b6164b8dc7
. It was then renamed/changed to Bootloader-Sets-Incorrect-Root in
https://salsa.debian.org/installer-team/flash-kernel/-/commit/850c8fc323bbab52a6264035d11edd372ce2596f
with a fallback mechanism for Bootloader-Sets-Root, but there's no fallback for
Bootloader-sets-root (and the code is case-sensitive).

This resulted in a non-booting system for me after upgading from Debian Wheezy
(with a custom device description).