Hi, “by mistake” 
I uninstalled Clamav and now I can’t update the system. Is it possible to fix this?
Debian 9
root@server:~# apt upgrade && apt update -y
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
clamav-daemon : Depends: clamav-base (= 0.102.4+dfsg-0+deb9u1) but 0.102.4+dfsg-0+deb9u2 is installed
Recommends: clamdscan but it is not installed
mariadb-client : Depends: mariadb-client-10.5 (>= 1:10.5.12+maria~stretch) but 1:10.5.11+maria~stretch is installed
mariadb-server : Depends: mariadb-server-10.5 (>= 1:10.5.12+maria~stretch) but 1:10.5.11+maria~stretch is installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
root@server:~# apt --fix-broken install -y
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following additional packages will be installed:
clamav-daemon mariadb-client-10.5 mariadb-client-core-10.5 mariadb-server-10.5 mariadb-server-core-10.5
Suggested packages:
libclamunrar apparmor clamav-docs daemon mariadb-test netcat-openbsd
Recommended packages:
clamdscan
The following packages will be upgraded:
clamav-daemon mariadb-client-10.5 mariadb-client-core-10.5 mariadb-server-10.5 mariadb-server-core-10.5
5 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
94 not fully installed or removed.
Need to get 0 B/13.9 MB of archives.
After this operation, 146 kB disk space will be freed.
Preconfiguring packages ...
(Reading database ... 46066 files and directories currently installed.)
Preparing to unpack .../clamav-daemon_0.102.4+dfsg-0+deb9u2_amd64.deb ...
Failed to stop clamav-daemon.service: Unit clamav-daemon.service not loaded.
invoke-rc.d: initscript clamav-daemon, action "stop" failed.
dpkg: warning: subprocess old pre-removal script returned error exit status 5
dpkg: trying script from the new package instead ...
Failed to stop clamav-daemon.service: Unit clamav-daemon.service not loaded.
invoke-rc.d: initscript clamav-daemon, action "stop" failed.
dpkg: error processing archive /var/cache/apt/archives/clamav-daemon_0.102.4+dfsg-0+deb9u2_amd64.deb (--unpack):
subprocess new pre-removal script returned error exit status 5
Failed to start clamav-daemon.service: Unit clamav-daemon.service is not loaded properly: Invalid argument.
See system logs and 'systemctl status clamav-daemon.service' for details.
invoke-rc.d: initscript clamav-daemon, action "start" failed.
● clamav-daemon.service - Clam AntiVirus userspace daemon
Loaded: error (Reason: Invalid argument)
Drop-In: /etc/systemd/system/clamav-daemon.service.d
└─extend.conf
Active: inactive (dead)
Docs: man:clamd(8)
man:clamd.conf(5)
https://www.clamav.net/documents/
Sep 01 09:18:37 server systemd[1]: clamav-daemon.service: Service has more than one ExecStart= setting, which is only allowed for Type=oneshot servi…s. Refusing.
Sep 01 09:18:37 server systemd[1]: clamav-daemon.service: Service has more than one ExecStart= setting, which is only allowed for Type=oneshot servi…s. Refusing.
Sep 01 09:20:07 server systemd[1]: clamav-daemon.service: Service has more than one ExecStart= setting, which is only allowed for Type=oneshot servi…s. Refusing.
Sep 01 09:20:07 server systemd[1]: clamav-daemon.service: Service has more than one ExecStart= setting, which is only allowed for Type=oneshot servi…s. Refusing.
Sep 01 09:20:08 server systemd[1]: clamav-daemon.service: Service has more than one ExecStart= setting, which is only allowed for Type=oneshot servi…s. Refusing.
Sep 01 09:20:08 server systemd[1]: clamav-daemon.service: Service has more than one ExecStart= setting, which is only allowed for Type=oneshot servi…s. Refusing.
Sep 01 09:22:04 server systemd[1]: clamav-daemon.service: Service has more than one ExecStart= setting, which is only allowed for Type=oneshot servi…s. Refusing.
Sep 01 09:22:04 server systemd[1]: clamav-daemon.service: Service has more than one ExecStart= setting, which is only allowed for Type=oneshot servi…s. Refusing.
Sep 01 09:22:05 server systemd[1]: clamav-daemon.service: Service has more than one ExecStart= setting, which is only allowed for Type=oneshot servi…s. Refusing.
Sep 01 09:22:05 server systemd[1]: clamav-daemon.service: Service has more than one ExecStart= setting, which is only allowed for Type=oneshot servi…s. Refusing.
Hint: Some lines were ellipsized, use -l to show in full.
dpkg: error while cleaning up:
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
/var/cache/apt/archives/clamav-daemon_0.102.4+dfsg-0+deb9u2_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)