package linux-image-4.4.0-51-generic 4.4.0-51.72~14.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

I came home to this error. MY boot drive had filled up with old images. I deleted old images and headers to clear up space and reboot.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: linux-image-4.4.0-51-generic 4.4.0-51.72~14.04.1
ProcVersionSignature: Ubuntu 4.4.0-51.72~14.04.1-generic 4.4.30
Uname: Linux 4.4.0-51-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
Date: Wed Nov 30 08:04:06 2016
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationDate: Installed on 2015-09-15 (442 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.7
 apt 1.0.1ubuntu2.14
SourcePackage: linux-lts-xenial
Title: package linux-image-4.4.0-51-generic 4.4.0-51.72~14.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)