I followed this
here
The result of my console showed me this :
astronom@ubuntu:~$ sudo apt-get -o Dpkg::Options::="--force-overwrite" install libgphoto2-port12
Reading package lists... Done
Building dependency tree
Reading state information... Done libgphoto2-port12 is already the newest version (2.5.17+201801012117~ubuntu16.04.1). 0 upgraded, 0 newly installed, 0 to remove and 16 not upgraded.