boot - Grub shows "lsb_release -i -s 2 ..." instead of "Ubuntu"

After doing apt-get update my grub shows s "lsb_release -i -s 2 ..." instead of "Ubuntu". How to make it shows back "Ubuntu"? Of course I can edit it manually in /etc/boot/grub.cfg. But every doing update and upgrade with kernel it will shows again s "lsb_release -i -s 2 ..." as shown in the figure.

I guess I must edit something in /etc/default/grub.

Anyone experience with this problem?

After some update and upgrade the problem disappear. Alternatively, you can re-configure all packages and prompt "new" instead of keep old configuration.

here the example,

sudo dpkg-reconfigure -a