I did some more testing in throwaway containers.
In each test starting point was same:
apt-get install default-mysql-server zoph
sed s/bullseye/bookworm/g -i /etc/apt/sources.list
apt update
All cases ran apt 2.6.0.
I only varied the command that followed:
1) apt-get install default-mysql-server
Fails:
debconf: delaying package configuration, since apt-utils is not installed
(Reading database ... 16648 files and directories currently installed.)
Preparing to unpack .../mysql-common_5.8+1.1.0_all.deb ...
Unpacking mysql-common (5.8+1.1.0) over (5.8+1.0.7) ...
Preparing to unpack .../mariadb-common_1%3a10.11.2-1_all.deb ...
Unpacking mariadb-common (1:10.11.2-1) over (1:10.5.19-0+deb11u2) ...
Preparing to unpack .../default-mysql-server_1.1.0_all.deb ...
Unpacking default-mysql-server (1.1.0) over (1.0.7) ...
dpkg: mariadb-client-10.5: dependency problems, but removing anyway as
you requested:
mariadb-server-10.5 depends on mariadb-client-10.5 (>= 1:10.5.19-0+deb11u2).
dbconfig-mysql depends on default-mysql-client | virtual-mysql-client; however:
Package default-mysql-client is not installed.
Package virtual-mysql-client is not installed.
Package mariadb-client-10.5 which provides virtual-mysql-client is
to be removed.
(Reading database ... 16648 files and directories currently installed.)
Removing mariadb-client-10.5 (1:10.5.19-0+deb11u2) ...
Removing mariadb-client-core-10.5 (1:10.5.19-0+deb11u2) ...
dpkg: mariadb-server-10.5: dependency problems, but removing anyway as
you requested:
zoph depends on default-mysql-server | virtual-mysql-server; however:
Package default-mysql-server is not configured yet.
Package virtual-mysql-server is not installed.
Package mariadb-server-10.5 which provides virtual-mysql-server is
to be removed.
Removing mariadb-server-10.5 (1:10.5.19-0+deb11u2) ...
Stopping MariaDB database server: mariadbd failed!
invoke-rc.d: initscript mariadb, action "stop" failed.
dpkg: error processing package mariadb-server-10.5 (--remove):
installed mariadb-server-10.5 package pre-removal script subprocess
returned error exit status 1
dpkg: too many errors, stopping
Errors were encountered while processing:
mariadb-server-10.5
Processing was halted because there were too many errors.
E: Sub-process /usr/bin/dpkg returned an error code (1)
# apt --fix-broken install mariadb-client
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
default-mysql-server : Depends: mariadb-server but it is not going to
be installed
mariadb-client : Depends: mariadb-client-core (>= 1:10.11.2-1) but it
is not going to be installed
Depends: libssl3 (>= 3.0.0) but it is not going to
be installed
Breaks: mariadb-server-10.5 but 1:10.5.19-0+deb11u2
is to be installed
mariadb-server-10.5 : Depends: mariadb-client-10.5 (>=
1:10.5.19-0+deb11u2) but it is not installable
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages
(or specify a solution).
2) apt upgrade
Passes:
Everything is unpacked and installed, and MariaDB server restart is
among the last things that happen and is successful.
Upgrade of default-mysql-server was postponed and starts only when
running 'apt full-upgrade'.
3) apt full-upgrade
Fails:
...
Preparing to unpack .../default-mysql-server_1.1.0_all.deb ...
Unpacking default-mysql-server (1.1.0) over (1.0.7) ...
dpkg: mariadb-client-10.5: dependency problems, but removing anyway as
you requested:
mariadb-server-10.5 depends on mariadb-client-10.5 (>= 1:10.5.19-0+deb11u2).
dbconfig-mysql depends on default-mysql-client | virtual-mysql-client; however:
Package default-mysql-client is not installed.
Package virtual-mysql-client is not installed.
Package mariadb-client-10.5 which provides virtual-mysql-client is
to be removed.
(Reading database ... 18487 files and directories currently installed.)
Removing mariadb-client-10.5 (1:10.5.19-0+deb11u2) ...
Removing mariadb-client-core-10.5 (1:10.5.19-0+deb11u2) ...
dpkg: mariadb-server-10.5: dependency problems, but removing anyway as
you requested:
zoph depends on default-mysql-server | virtual-mysql-server; however:
Package default-mysql-server is not configured yet.
Package virtual-mysql-server is not installed.
Package mariadb-server-10.5 which provides virtual-mysql-server is
to be removed.
Removing mariadb-server-10.5 (1:10.5.19-0+deb11u2) ...
Stopping MariaDB database server: mariadbd failed!
invoke-rc.d: initscript mariadb, action "stop" failed.
dpkg: error processing package mariadb-server-10.5 (--remove):
installed mariadb-server-10.5 package pre-removal script subprocess
returned error exit status 1
dpkg: too many errors, stopping
Errors were encountered while processing:
mariadb-server-10.5
Processing was halted because there were too many errors.
E: Sub-process /usr/bin/dpkg returned an error code (1)
4) apt dist-upgrade
Fails: Seems to do almost the same as full-upgrade (175 vs 174
packages updates).
Preparing to unpack .../default-mysql-server_1.1.0_all.deb ...
Unpacking default-mysql-server (1.1.0) over (1.0.7) ...
dpkg: mariadb-client-10.5: dependency problems, but removing anyway as
you requested:
mariadb-server-10.5 depends on mariadb-client-10.5 (>= 1:10.5.19-0+deb11u2).
dbconfig-mysql depends on default-mysql-client | virtual-mysql-client; however:
Package default-mysql-client is not installed.
Package virtual-mysql-client is not installed.
Package mariadb-client-10.5 which provides virtual-mysql-client is
to be removed.
(Reading database ... 18489 files and directories currently installed.)
Removing mariadb-client-10.5 (1:10.5.19-0+deb11u2) ...
Removing mariadb-client-core-10.5 (1:10.5.19-0+deb11u2) ...
dpkg: mariadb-server-10.5: dependency problems, but removing anyway as
you requested:
zoph depends on default-mysql-server | virtual-mysql-server; however:
Package default-mysql-server is not configured yet.
Package virtual-mysql-server is not installed.
Package mariadb-server-10.5 which provides virtual-mysql-server is
to be removed.
Removing mariadb-server-10.5 (1:10.5.19-0+deb11u2) ...
Stopping MariaDB database server: mariadbd failed!
invoke-rc.d: initscript mariadb, action "stop" failed.
dpkg: error processing package mariadb-server-10.5 (--remove):
installed mariadb-server-10.5 package pre-removal script subprocess
returned error exit status 1
dpkg: too many errors, stopping
Errors were encountered while processing:
mariadb-server-10.5
Processing was halted because there were too many errors.
E: Sub-process /usr/bin/dpkg returned an error code (1)
The new mariadb-server breaks/replaces on mariadb-server-10.5, and
mariadb-client breaks/replaces on mariadb-client-10.5.
I am not sure what to debug next.
