package dhcp-helper 1.1-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[David Durand]

release upgrade failed. I accepted the new dhcp script rather than taking the modifications... perhaps they had been made in the initial image I started from (years ago).

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: dhcp-helper 1.1-1
ProcVersionSignature: Ubuntu 3.2.0-109.150-virtual 3.2.79
Uname: Linux 3.2.0-109-virtual x86_64
ApportVersion: 2.14.1-0ubuntu3.24
Architecture: amd64
Date: Sat Jul 1 15:48:56 2017
DuplicateSignature: package:dhcp-helper:1.1-1:subprocess installed post-installation script returned error exit status 1
Ec2AMI: ami-6a5a8602
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-east-1b
Ec2InstanceType: c3.4xlarge
Ec2Kernel: aki-919dcaf8
Ec2Ramdisk: unavailable
ErrorMessage: subprocess installed post-installation script returned error exit status 1
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.7
 apt 1.0.1ubuntu2.17
SourcePackage: dhcp-helper
Title: package dhcp-helper 1.1-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to trusty on 2017-07-01 (0 days ago)
modified.conffile..etc.default.dhcp.helper: [deleted]
modified.conffile..etc.init.d.dhcp.helper: [deleted]