What is the correct fix for this piuparts related issue?

[Thomas Moulard <thomas.moulard@gmail.com>]

Dear all,
I recently uploaded a binary incompatible new version of the ViSP C++ library.

We have in testing a package libvisp2.8_2.8.0-5.1 and in unstable a
package libvisp2.9_2.9.0-2

piuparts testing2sid check now fails, see:
https://piuparts.debian.org/testing2sid/fail/libvisp-dev_2.9.0-2.log

Preparing to unpack .../libvisp2.9_2.9.0-2_amd64.deb ...
  Unpacking libvisp2.9:amd64 (2.9.0-2) ...
  dpkg: error processing archive
/var/cache/apt/archives/libvisp2.9_2.9.0-2_amd64.deb (--unpack):
   trying to overwrite
'/usr/share/visp/data/wireframe-simulator/circles2.bnd', which is also
in package libvisp2.8:amd64 2.8.0-5.1
  dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
  Preparing to unpack .../multiarch-support_2.19-5_amd64.deb ...
  Unpacking multiarch-support (2.19-5) over (2.19-4) ...
  Errors were encountered while processing:
   /var/cache/apt/archives/libvisp2.9_2.9.0-2_amd64.deb
  E: Sub-process /usr/bin/dpkg returned an error code (1)
2m29.1s ERROR: Command failed (status=100): ['chroot',
'/srv/piuparts.debian.org/tmp/tmpk7TUWx', 'apt-get', '-yf',
'dist-upgrade']

Apparently, libvisp2.8 and libvisp2.9 provides the same file which is
obviously an issue if one tries to install the two packages side by
side.

In this particular case, should libvisp2.9 declare a break+replace on libvisp2.8
or is there another better solution to solve this issue?

Thanks,
-- 
Thomas Moulard