python3-towncrier has an undeclared file conflict.  This may result in
an unpack error from dpkg.

The files
 * /usr/lib/python3/dist-packages/towncrier/__init__.py
 * /usr/lib/python3/dist-packages/towncrier/__main__.py
 * /usr/lib/python3/dist-packages/towncrier/_builder.py
 * /usr/lib/python3/dist-packages/towncrier/_git.py
 * /usr/lib/python3/dist-packages/towncrier/_project.py
 * /usr/lib/python3/dist-packages/towncrier/_settings/__init__.py
 * /usr/lib/python3/dist-packages/towncrier/_settings/fragment_types.py
 * /usr/lib/python3/dist-packages/towncrier/_settings/load.py
 * /usr/lib/python3/dist-packages/towncrier/_shell.py
 * /usr/lib/python3/dist-packages/towncrier/_writer.py
 * /usr/lib/python3/dist-packages/towncrier/build.py
 * /usr/lib/python3/dist-packages/towncrier/check.py
 * /usr/lib/python3/dist-packages/towncrier/click_default_group.py
 * /usr/lib/python3/dist-packages/towncrier/create.py
 * /usr/lib/python3/dist-packages/towncrier/templates/default.md
 * /usr/lib/python3/dist-packages/towncrier/templates/default.rst
 * /usr/lib/python3/dist-packages/towncrier/templates/hr-between-versions.rst
 * /usr/lib/python3/dist-packages/towncrier/templates/single-file-no-bullets.rst
 * /usr/lib/python3/dist-packages/towncrier/test/__init__.py
 * /usr/lib/python3/dist-packages/towncrier/test/helpers.py
 * /usr/lib/python3/dist-packages/towncrier/test/test_build.py
 * /usr/lib/python3/dist-packages/towncrier/test/test_builder.py
 * /usr/lib/python3/dist-packages/towncrier/test/test_check.py
 * /usr/lib/python3/dist-packages/towncrier/test/test_create.py
 * /usr/lib/python3/dist-packages/towncrier/test/test_format.py
 * /usr/lib/python3/dist-packages/towncrier/test/test_git.py
 * /usr/lib/python3/dist-packages/towncrier/test/test_project.py
 * /usr/lib/python3/dist-packages/towncrier/test/test_settings.py
 * /usr/lib/python3/dist-packages/towncrier/test/test_write.py
are contained in the packages
 * python3-towncrier/25.8.0-2 as present in unstable
 * towncrier/24.8.0-2 as present in trixie|forky

These packages can be unpacked concurrently, because there is no
relevant Replaces or Conflicts relation.  Attempting to unpack these
packages concurrently results in an unpack error from dpkg, because none
of the packages installs a diversion for the affected files.

Kind regards

Helmut Grohne

Control: retitle -1 python3-towncrier: Undeclared file conflict with earlier 'towncrier' versions
Control: tags -1 + confirmed pending

This is because ‘python3-towncrier’ currently declares only a “Breaks”
relationship, which allows unpacking over the older ‘towncrier’ versions.
This relationship is incorrect.

The correction is to tighten the relationship to “Conflicts”, that signals
to ‘dpkg’ it must not unpack over the existing package. (As described in
Policy §7.4, “Conflicting binary packages - "Conflicts"”.)

That correction is now implemented, and will be part of the next package
release.