“com.android.ddmlib.installexception: install_failed_update_incompatible: package com.pro académie Les signatures ne correspondent pas à la version précédemment installée; Ignorer!” Réponses codées

com.android.ddmlib.installexception: install_failed_update_incompatible: package com.pro académie Les signatures ne correspondent pas à la version précédemment installée; Ignorer!

You need to uninstall it because you are using a different signature than the 
original. If it is not working it might be because it is still installed for 
another user on the device. To completely uninstall, go to 
Settings -> Apps -> HAgnostic News -> Options (the three dots on top right) -> Uninstall for all users