Hi,
The package gnome-phone-manager uses debhelper with a compat level of 5 or 6,
which is deprecated and scheduled for removal[1].
Please bump the debhelper compat at your earliest convenience
/outside the freeze/!
* Compat 13 is recommended (supported in stable-backports)
* Compat 7 is the bare minimum
PLEASE KEEP IN MIND THAT the release team *DOES NOT* accept uploads
with compat bumps during the freeze.
If there is any risk that the fix for this bug might not migrate to
testing before 2021-01-01[3] then please postpone the fix until after
the freeze.
At the time of filing this bug, compat 5 and 6 are expected to be
removed "some time during the development cycle of bookworm".
Thanks,
~Niels
[1] https://lists.debian.org/debian-devel/2020/07/msg00065.html
[2] https://release.debian.org/bullseye/FAQ.html
[3] The choice of 2021-01-01 as a "deadline" is set before the actual
freeze deadline to provide a safe cut off point for most people.
Mind you, it is still your responsibility to ensure that the upload
makes it into testing even if you upload before that date.