Conf apache2-doc not properly enabled error

It may happen that when updating the server you get the error conf apache2-doc not properly enabled.

First of all it is nothing serious, it is a problem certainly due to some hitch occurred in previous updates, in the specific case it concerns the apache doc module.

the solution is as quick as it is simple, simply clean up the package and then reinstall it with the following commands:

apt-get purge apache2-doc
apt-get install apache2-doc

for confirmation you can relaunch the commands:

apt-get update
apt-get -u upgrade

The procedure has been tested on debian 9 and debian 10, but the mechanism will be usable on any distribution as long as you use the commands (if necessary).