Доступна новая версия файла конфигурации / etc / default / grub, но установленная версия была локально изменена

sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt update
sudo apt upgrade

Затем появился этот экран, на котором написано

A new version (/tmp/grub.5gRinQVE9u) of configuration file /etc/default/grub is available, but the version installed currently has been locally modified. 

What do you want to do about modified configuration file grub?

install the package maintainer's version
keep the local version currently installed 
show the differences between the versions
show a side-by-side difference between the versions
show a 3-way difference between available versions 
do a 3-way merge between available versions 
start a new shell to examine the situation

Как мне это исправить?

Спасибо!