Bug#1100548: bellesip-data/trixie fails to upgrade from libbellesip1/bookworm

[Helmut Grohne]

Package: bellesip-data
Version: 5.3.105+dfsg-3
Severity: serious
User: debian-qa at lists.debian.org
Usertags: fileconflict
Control: affects -1 + libbellesip1

Hi,

installing bellesip-data/trixie on a bookworm system containing 
libbellesip1 fails with an unpack error. This situation may arise in a 
distribution upgrade. You can reproduce the issue using

    mmdebstrap --verbose --variant=apt '' /dev/null 'deb http://deb.debian.org/debian bookworm main' --include=libbellesip1 --chrooted-customize-hook='sed -i -e s/bookworm/trixie/ /etc/apt/sources.list && apt-get update && apt-get -y install bellesip-data'

and observe the failure as follows:

    Selecting previously unselected package bellesip-data.
    (Reading database ... 6829 files and directories currently installed.)
    Preparing to unpack .../bellesip-data_5.3.105+dfsg-3_all.deb ...
    Unpacking bellesip-data (5.3.105+dfsg-3) ...
    dpkg: error processing archive 
    /var/cache/apt/archives/bellesip-data_5.3.105+dfsg-3_all.deb (--unpack):
     trying to overwrite '/usr/share/belr/grammars/sdp_grammar', which is also in package libbellesip1:amd64 5.1.64+dfsg-2
    Errors were encountered while processing:
     /var/cache/apt/archives/bellesip-data_5.3.105+dfsg-3_all.deb
    E: Sub-process /usr/bin/dpkg returned an error code (1)

Is this a case of missing Breaks+Replaces?

Helmut