Broken package udpating Ubuntu 18.04 GL dispatch library
I just had this issue, run
sudo dpkg -i --force-overwrite /var/cache/apt/archives/libglvnd-dev_1.0.0-2ubuntu2.2_amd64.deb
sudo dpkg -i --force-overwrite /var/cache/apt/archives/libgles1_1.0.0-2ubuntu2.2_amd64.deb
sudo apt -f install