package linux-image-extra-3.16.0-48-generic 3.16.0-48.64~14.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

If I leave my computer idle overnight, this bug report comes up on my screen.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: linux-image-extra-3.16.0-48-generic 3.16.0-48.64~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-46.62~14.04.1-generic 3.16.7-ckt15
Uname: Linux 3.16.0-46-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.12
Architecture: amd64
Date: Fri Sep 4 08:14:58 2015
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2015-03-20 (167 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.4
 apt 1.0.1ubuntu2.10
SourcePackage: linux-lts-utopic
Title: package linux-image-extra-3.16.0-48-generic 3.16.0-48.64~14.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)