Bug#1033801: libqt6core5compat6-dev: Cannot install on Bullseye with backports

[Jean-Michaël Celerier <jeanmichael.celerier@gmail.com>]

Package: libqt6core5compat6-dev
Severity: important
X-Debbugs-Cc: jeanmichael.celerier@gmail.com

Dear Maintainer,
When I try to install the package with apt I get:

libqt6core5compat6-dev : Depends: libqt6core5compat6 (= 6.3.1-2~bpo11+1) but 6.4.2-1~bpo11+1 is to be installed

It can be reproduced on a clean debian:bullseye docker image, with just the bullseye-backports repo added.

Cheers!

-- System Information:
Debian Release: 11.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.19.5-arch1-1 (SMP w/128 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: unable to detect

Versions of packages libqt6core5compat6-dev depends on:
pn  libqt6core5compat6  <none>
pn  qt6-base-dev        <none>

libqt6core5compat6-dev recommends no packages.

libqt6core5compat6-dev suggests no packages.