I am a little unclear what you are trying to do, and why you are not happy with the version of Gramps that was provided at the time that Ubuntu Trusty was released (4.0.3).
It looks like you installed a beta version of Gramps 4.2.0 from the Gramps Project website, and now you are trying to re-install the original version. To do this, you will need to uninstall the beta version first, as the upstream beta version has a different package name, and Synaptic does not know that the two packages with different names are the same package. The latest version of Gramps available for Trusty is 4.0.4, but you will have to enable the backports resository to get this version (https://help.ubuntu.com/community/UbuntuBackports). If you want a later version than this then I recommend you install a more stable version from the Gramps Project website (e.g. 4.1.3). But don't expect an automatic upgrade to a newer version once you start using the versions from the Gramps Project Website. ** Changed in: gramps (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1470843 Title: package gramps (not installed) failed to install/upgrade: tentative de remplacement de « /usr/bin/gramps », qui appartient aussi au paquet python3-gramps 4.1.99 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gramps/+bug/1470843/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs