Unpacking kodi-addons-dev from bullseye-backports onto bullseye with
kodi-addons-dev-common may fail:

| Preparing to unpack kodi-addons-dev_2%3a19.4+dfsg2-2~bpo11+1_amd64.deb ...
| Unpacking kodi-addons-dev:amd64 (2:19.4+dfsg2-2~bpo11+1) ...
| dpkg: error processing archive kodi-addons-dev_2%3a19.4+dfsg2-2~bpo11+1_amd64.deb (--unpack):
|  trying to overwrite '/usr/bin/dh_kodiaddon_depends', which is also in package kodi-addons-dev-common 2:19.1+dfsg2-2+deb11u1
| Errors were encountered while processing:
|  kodi-addons-dev_2%3a19.4+dfsg2-2~bpo11+1_amd64.deb

This is missing Breaks+Replaces and is fixed in bookworm.

I suggest that kodi-addons-dev is either removed from backports or
updated to the version in bookworm.

Helmut