Update:
sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
linux-headers-4.15.0-38 linux-headers-4.15.0-38-generic
linux-headers-4.15.0-42 linux-headers-4.15.0-42-generic
linux-headers-4.15.0-43 linux-headers-4.15.0-43-generic
linux-headers-4.15.0-45 linux-headers-4.15.0-45-generic
linux-headers-4.15.0-46 linux-headers-4.15.0-46-generic
linux-headers-4.15.0-47 linux-headers-4.15.0-47-generic
linux-headers-4.15.0-50 linux-headers-4.15.0-50-generic
linux-image-4.15.0-38-generic linux-image-4.15.0-42-generic
linux-image-4.15.0-43-generic linux-image-4.15.0-45-generic
linux-image-4.15.0-46-generic linux-image-4.15.0-47-generic
linux-image-4.15.0-50-generic linux-modules-4.15.0-38-generic
linux-modules-4.15.0-42-generic linux-modules-4.15.0-43-generic
linux-modules-4.15.0-45-generic linux-modules-4.15.0-46-generic
linux-modules-4.15.0-47-generic linux-modules-4.15.0-50-generic
linux-modules-extra-4.15.0-38-generic linux-modules-extra-4.15.0-42-generic
linux-modules-extra-4.15.0-43-generic linux-modules-extra-4.15.0-45-generic
linux-modules-extra-4.15.0-46-generic linux-modules-extra-4.15.0-47-generic
linux-modules-extra-4.15.0-50-generic qtdeclarative5-controls-plugin
qtdeclarative5-dialogs-plugin
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
libpng12-0
The following NEW packages will be installed:
libpng12-0
0 upgraded, 1 newly installed, 0 to remove and 116 not upgraded.
14 not fully installed or removed.
Need to get 0 B/116 kB of archives.
After this operation, 285 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 623068 files and directories currently installed.)
Preparing to unpack .../libpng12-0_1.2.54-1ubuntu1.1_amd64.deb ...
Unpacking libpng12-0:amd64 (1.2.54-1ubuntu1.1) ...
dpkg: error processing archive /var/cache/apt/archives/libpng12-0_1.2.54-1ubuntu1.1_amd64.deb (--unpack):
trying to overwrite shared '/usr/share/doc/libpng12-0/changelog.Debian.gz', which is different from other instances of package libpng12-0:amd64
Processing triggers for libc-bin (2.23-0ubuntu10) ...
Errors were encountered while processing:
/var/cache/apt/archives/libpng12-0_1.2.54-1ubuntu1.1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
sudo rm /usr/share/doc/libpng12-0/changelog.Debian.gz
sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
linux-headers-4.15.0-38 linux-headers-4.15.0-38-generic
linux-headers-4.15.0-42 linux-headers-4.15.0-42-generic
linux-headers-4.15.0-43 linux-headers-4.15.0-43-generic
linux-headers-4.15.0-45 linux-headers-4.15.0-45-generic
linux-headers-4.15.0-46 linux-headers-4.15.0-46-generic
linux-headers-4.15.0-47 linux-headers-4.15.0-47-generic
linux-headers-4.15.0-50 linux-headers-4.15.0-50-generic
linux-image-4.15.0-38-generic linux-image-4.15.0-42-generic
linux-image-4.15.0-43-generic linux-image-4.15.0-45-generic
linux-image-4.15.0-46-generic linux-image-4.15.0-47-generic
linux-image-4.15.0-50-generic linux-modules-4.15.0-38-generic
linux-modules-4.15.0-42-generic linux-modules-4.15.0-43-generic
linux-modules-4.15.0-45-generic linux-modules-4.15.0-46-generic
linux-modules-4.15.0-47-generic linux-modules-4.15.0-50-generic
linux-modules-extra-4.15.0-38-generic linux-modules-extra-4.15.0-42-generic
linux-modules-extra-4.15.0-43-generic linux-modules-extra-4.15.0-45-generic
linux-modules-extra-4.15.0-46-generic linux-modules-extra-4.15.0-47-generic
linux-modules-extra-4.15.0-50-generic qtdeclarative5-controls-plugin
qtdeclarative5-dialogs-plugin
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
libpng12-0
The following NEW packages will be installed:
libpng12-0
0 upgraded, 1 newly installed, 0 to remove and 116 not upgraded.
14 not fully installed or removed.
Need to get 0 B/116 kB of archives.
After this operation, 285 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 623068 files and directories currently installed.)
Preparing to unpack .../libpng12-0_1.2.54-1ubuntu1.1_amd64.deb ...
Unpacking libpng12-0:amd64 (1.2.54-1ubuntu1.1) ...
Processing triggers for libc-bin (2.23-0ubuntu10) ...
Setting up libpng12-0:i386 (1.2.54-1ubuntu1.1) ...
Setting up libpng12-0:amd64 (1.2.54-1ubuntu1.1) ...
Setting up libreoffice-core (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Setting up libreoffice-pdfimport (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Setting up libreoffice-avmedia-backend-gstreamer (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Setting up libreoffice-base-core (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Setting up libreoffice-calc (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Setting up libreoffice-draw (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Setting up libreoffice-gtk (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Setting up libreoffice-gnome (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Setting up libreoffice-impress (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Setting up libreoffice-math (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Setting up libreoffice-writer (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Setting up python3-uno (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Setting up libreoffice-ogltrans (1:5.1.6~rc2-0ubuntu1~xenial7) ...
Processing triggers for libc-bin (2.23-0ubuntu10) ...
