Locally modified /boot/grub/menu.lst on update ubuntu 16.04 with AWS EC2

Question

I'm running ubuntu 16.04 on an Amazon AWS EC2 and have just run sudo apt-get dist-upgrade to update the suggested packages in the console.

During which I have been prompted with A new version of /boot/grub/menu.lst is available, but the version installed currently has been locally modified. in the package configuration of menu.lst

We haven't made any changes so I am to assume that this is a setting by Amazon AWS EC2.

How should I proceed?

Line by line differences between versions

--- /run/grub/menu.lst root.root 0644 2018-01-25 22:33:02
+++ /tmp/fileeCfBYY root.root 0600 2018-01-25 22:33:02
@@ -3,11 +3,9 @@
   title Ubuntu 16.04.3 LTS, kernel 4.4.0-97-generic 
   root (hd0)
   kernel /boot/vmlinuz-4.4.0-97-generic root=LABEL=cloudimg-rootfs ro console=hvc0
-initrd /boot/initrd.img-4.4.0-97-generic 

   title Ubuntu 16.04.3 LTS, kernel 4.4.0-97-generic (recovery mode)
   root (hd0)
   kernel /boot/vmlinuz-4.4.0-97-generic root=LABEL=cloudimg-rootfs ro single 
-initrd /boot/initrd.img-4.4.0-97-generic 

### END DEBIAN AUTOMAGIC KERNELS LIST 

Answer 1

File permissions have changed

old : root.root 0644 new : root.root 0600

as suggested I would select "package maintainer's version"