Error upgrading 0.18c to 0.20

Hi guys,

I’m having the following error when trying to upgrade to 0.20:

Primary Hostname:
Public IP Address: xx.xx.xx.36
Private IPv6 Address: ::1
Mail-in-a-Box Version:  v0.20

Updating system packages...
Installing system packages...
Initializing system random number generator...
Firewall is active and enabled on system startup
Installing nsd (DNS server)...
Installing Postfix (SMTP server)...
Installing Dovecot (IMAP server)...
Installing OpenDKIM/OpenDMARC...
Installing SpamAssassin...

FAILED: apt-get -y -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confnew install spampd razor pyzor dovecot-antispam libmail-dkim-perl
Reading package lists...
Building dependency tree...
Reading state information...
libmail-dkim-perl is already the newest version.
pyzor is already the newest version.
razor is already the newest version.
spampd is already the newest version.
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 dovecot-antispam : Depends: dovecot-imapd (< 1:2.2.9.) but 1:2.2.13-2c~trusty is to be installed
E: Unable to correct problems, you have held broken packages.

I already tried puring dovecot-core and manual install via apt-get.

Any clues on how to solve this?

Many thanks and keep up the wonderful work!!


Edit: formatting and obscuring IP

You haven’t installed any PPAs or changed your apt sources, have you?

Does apt-get -f install do anything?

And, what about apt-get install dovecot-antispam ?