How to generate debconf for specific packages?

I try to clone a Debian10 computer in a VM automatically via [tag:vagrant]. I start from scratch with [tag:packer] then reinstall all the packages and configurations. So, I tried from hardware computer: dpkg --get-selections > dpkg debconf-get-selections > debconf then import them from the VM : debconf-set-selections confold: If a conffile has been modified and the version in the package did change, always keep the old version without prompting, unless the --force-confdef is also specified, in which case the default action is preferred. But I get prompted, even with this switch. msmtp debconf: $ grep msmtp debconf # Action souhaitée pour le fichier de configuration modifié msmtprc : msmtp msmtp/auto_from boolean true msmtp msmtp/tls boolean on on on /etc/ssl/certs/ca-certificates.crt msmtp msmtp/host string smtp.foobarmail.com msmtp msmtp/maildomain string msmtp msmtp/port string 587 msmtp msmtp/sysconfig boolean true phpldapadmin debconf: $ grep phpldapadmin ../../files/debconf.db phpldapadmin phpldapadmin/restart-webserver boolean true phpldapadmin phpldapadmin/ldap-authtype select session phpldapadmin phpldapadmin/ldap-server string 127.0.0.1 phpldapadmin phpldapadmin/ldap-basedn string xxxx phpldapadmin phpldapadmin/ldap-bindpw string secret phpldapadmin phpldapadmin/ldap-tls boolean false phpldapadmin phpldapadmin/reconfigure-webserver multiselect apache2 phpldapadmin phpldapadmin/ldap-binddn string xxxx