package grub-pc 2.02~beta2-36ubuntu3.10 failed to install/upgrade: Unterprozess installiertes post-installation-Skript gab den Fehlerwert 2 zurück

[Cornelius Knopp]

I tried to upgrade all of the packages.
(sudo apt-get update && sudo apt-get upgrade -y)
But grub doesnt want to update

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: grub-pc 2.02~beta2-36ubuntu3.10
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic i686
ApportVersion: 2.20.1-0ubuntu2.6
Architecture: i386
Date: Sat May 20 07:53:36 2017
ErrorMessage: Unterprozess installiertes post-installation-Skript gab den Fehlerwert 2 zurück
InstallationDate: Installed on 2016-03-12 (433 days ago)
InstallationMedia: Lubuntu 15.10 "Wily Werewolf" - Release i386 (20151021)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic root=UUID=819b8040-a3b8-467a-8016-ee205c050fae ro persistent quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.20
SourcePackage: grub2
Title: package grub-pc 2.02~beta2-36ubuntu3.10 failed to install/upgrade: Unterprozess installiertes post-installation-Skript gab den Fehlerwert 2 zurück
UpgradeStatus: Upgraded to xenial on 2016-06-19 (334 days ago)