Vous ne pouvez pas faire ça maintenant car dpkg/apt semble avoir laissé des choses non configurées

Bonsoir, merci pour votre premier message, si j’utilise la cde: sudo apt install --fix-broken
J obtient cette réponse sur la console:
admin@xxxx56:~$ sudo apt install --fix-broken
Lecture des listes de paquets… Fait
Construction de l’arbre des dépendances
Lecture des informations d’état… Fait
Correction des dépendances… Fait
The following additional packages will be installed:
postfix-ldap postfix-pcre
Les paquets suivants seront mis à jour :
postfix-ldap postfix-pcre
2 mis à jour, 0 nouvellement installés, 0 à enlever et 177 non mis à jour.
2 partiellement installés ou enlevés.
Il est nécessaire de prendre 0 o/663 ko dans les archives.
Après cette opération, 0 o d’espace disque supplémentaires seront utilisés.
Souhaitez-vous continuer ? [O/n] o
Lecture des fichiers de modifications (« changelog »)… Terminé
Paramétrage de postfix (3.1.15-0+deb9u1) …
postconf: warning: /etc/postfix/main.cf, line 169: overriding earlier entry: relayhost=
postconf: fatal: /etc/postfix/main.cf, line 170: missing ‘=’ after attribute name: “service postfix restart”
Use of uninitialized value $destinations in scalar chomp at /var/lib/dpkg/info/postfix.config line 221.
Use of uninitialized value $[1] in join or string at /usr/share/perl5/Debconf/Client/ConfModule.pm line 121.
postconf: warning: /etc/postfix/main.cf, line 169: overriding earlier entry: relayhost=
postconf: fatal: /etc/postfix/main.cf, line 170: missing ‘=’ after attribute name: “service postfix restart”
Use of uninitialized value $mynetworks in scalar chomp at /var/lib/dpkg/info/postfix.config line 285.
Use of uninitialized value $
[1] in join or string at /usr/share/perl5/Debconf/Client/ConfModule.pm line 121.
postconf: warning: /etc/postfix/main.cf, line 169: overriding earlier entry: relayhost=
postconf: fatal: /etc/postfix/main.cf, line 170: missing ‘=’ after attribute name: “service postfix restart”
Use of uninitialized value $protos in scalar chomp at /var/lib/dpkg/info/postfix.config line 387.
Use of uninitialized value $_[1] in join or string at /usr/share/perl5/Debconf/Client/ConfModule.pm line 121.

Postfix (main.cf) configuration was not changed. If you need to make changes,
edit /etc/postfix/main.cf (and others) as needed. To view Postfix
configuration values, see postconf(1).

After modifying main.cf, be sure to run ‘service postfix reload’.

Running newaliases
postconf: warning: /etc/postfix/main.cf, line 169: overriding earlier entry: relayhost=
postconf: fatal: /etc/postfix/main.cf, line 170: missing ‘=’ after attribute name: “service postfix restart”
newaliases: warning: /etc/postfix/main.cf, line 169: overriding earlier entry: relayhost=
newaliases: fatal: /etc/postfix/main.cf, line 170: missing ‘=’ after attribute name: “service postfix restart”
dpkg: erreur de traitement du paquet postfix (–configure) :
le sous-processus script post-installation installé a retourné une erreur de sortie d’état 75
Des erreurs ont été rencontrées pendant l’exécution :
postfix
E: Sub-process /usr/bin/dpkg returned an error code (1)

Et si j’utilise celle ci
j’obtiens:
Using username “admin”.
Debian GNU/Linux 9
admin@192.168.1.18’s password:
Linux xxxx56.ovh 4.9.0-12-amd64 #1 SMP Debian 4.9.210-1+deb9u1 (202 0-06-07) x86_64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Tue Sep 8 20:38:18 2020 from 192.168.1.35
admin@xxxx56:~$ sudo dpkg --configure -a
Paramétrage de php7.2-fpm (7.2.32-1+0~20200710.46+debian9~1.gbp625eb5) …
Job for php7.2-fpm.service failed because the control process exited with error code.
See “systemctl status php7.2-fpm.service” and “journalctl -xe” for details.
invoke-rc.d: initscript php7.2-fpm, action “restart” failed.
● php7.2-fpm.service - The PHP 7.2 FastCGI Process Manager
Loaded: loaded (/lib/systemd/system/php7.2-fpm.service; enabled; vendor prese t: enabled)
Active: failed (Result: exit-code) since Tue 2020-09-08 20:48:39 CEST; 17ms a go
Docs: man:php-fpm7.2(8)
Process: 19012 ExecStopPost=/usr/lib/php/php-fpm-socket-helper remove /run/php /php-fpm.sock /etc/php/7.2/fpm/pool.d/www.conf 72 (code=exited, status=0/SUCCESS )
Process: 19010 ExecStart=/usr/sbin/php-fpm7.2 --nodaemonize --fpm-config /etc/ php/7.2/fpm/php-fpm.conf (code=exited, status=78)
Main PID: 19010 (code=exited, status=78)

sept. 08 20:48:39 xxxx56.ovh systemd[1]: Starting The PHP 7.2 Fa……
sept. 08 20:48:39 xxxx56.ovh php-fpm7.2[19010]: [08-Sep-2020 20:…ry
sept. 08 20:48:39 xxxx56.ovh php-fpm7.2[19010]: [08-Sep-2020 20:…on
sept. 08 20:48:39 xxxx56.ovh php-fpm7.2[19010]: [08-Sep-2020 20:…ed
sept. 08 20:48:39 xxxx56.ovh systemd[1]: php7.2-fpm.service: Mai…/a
sept. 08 20:48:39 xxxx56.ovh systemd[1]: Failed to start The PHP…r.
sept. 08 20:48:39 xxxx56.ovh systemd[1]: php7.2-fpm.service: Uni…e.
sept. 08 20:48:39 xxxx56.ovh systemd[1]: php7.2-fpm.service: Fai…’.
Hint: Some lines were ellipsized, use -l to show in full.
dpkg: erreur de traitement du paquet php7.2-fpm (–configure) :
le sous-processus script post-installation installé a retourné une erreur de so rtie d’état 1
Paramétrage de postfix (3.1.15-0+deb9u1) …
postconf: warning: /etc/postfix/main.cf, line 169: overriding earlier entry: rel ayhost=
postconf: fatal: /etc/postfix/main.cf, line 170: missing ‘=’ after attribute nam e: “service postfix restart”
Use of uninitialized value $destinations in scalar chomp at /var/lib/dpkg/info/p ostfix.config line 221.
Use of uninitialized value $[1] in join or string at /usr/share/perl5/Debconf/C lient/ConfModule.pm line 121.
postconf: warning: /etc/postfix/main.cf, line 169: overriding earlier entry: rel ayhost=
postconf: fatal: /etc/postfix/main.cf, line 170: missing ‘=’ after attribute nam e: “service postfix restart”
Use of uninitialized value $mynetworks in scalar chomp at /var/lib/dpkg/info/pos tfix.config line 285.
Use of uninitialized value $
[1] in join or string at /usr/share/perl5/Debconf/C lient/ConfModule.pm line 121.
postconf: warning: /etc/postfix/main.cf, line 169: overriding earlier entry: rel ayhost=
postconf: fatal: /etc/postfix/main.cf, line 170: missing ‘=’ after attribute nam e: “service postfix restart”
Use of uninitialized value $protos in scalar chomp at /var/lib/dpkg/info/postfix .config line 387.
Use of uninitialized value $_[1] in join or string at /usr/share/perl5/Debconf/C lient/ConfModule.pm line 121.

Postfix (main.cf) configuration was not changed. If you need to make changes,
edit /etc/postfix/main.cf (and others) as needed. To view Postfix
configuration values, see postconf(1).

After modifying main.cf, be sure to run ‘service postfix reload’.

Running newaliases
postconf: warning: /etc/postfix/main.cf, line 169: overriding earlier entry: rel ayhost=
postconf: fatal: /etc/postfix/main.cf, line 170: missing ‘=’ after attribute nam e: “service postfix restart”
newaliases: warning: /etc/postfix/main.cf, line 169: overriding earlier entry: r elayhost=
newaliases: fatal: /etc/postfix/main.cf, line 170: missing ‘=’ after attribute n ame: “service postfix restart”
dpkg: erreur de traitement du paquet postfix (–configure) :
le sous-processus script post-installation installé a retourné une erreur de so rtie d’état 75
Des erreurs ont été rencontrées pendant l’exécution :
php7.2-fpm
postfix

L’interprétation de ces indications dépassent mes compétences, merci d’avance pour votre aide à la résolution de cette difficultées.