Updating a blade

I just purchased a blade, and have connected it to the network.

I did a

sudo apt-get update && sudo apt-get dist-upgrade && sudo apt-get autoremove

There was a problem with one of the packages, apt suggested i do

sudo apt-get update --fix-missing

Now I get this warning about grub. What should I do.

A new version (/tmp/grub.8twsAk6sdb) 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 │