package isc-dhcp-server 4.2.4-7ubuntu14 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

package isc-dhcp-server 4.2.4-7ubuntu14 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

ProblemType: Package
DistroRelease: Ubuntu 14.10
Package: isc-dhcp-server 4.2.4-7ubuntu14
ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
Uname: Linux 3.13.0-37-generic x86_64
ApportVersion: 2.14.7-0ubuntu8.1
Architecture: amd64
Date: Thu Feb 5 09:54:32 2015
DhServerLeases:

DuplicateSignature: package:isc-dhcp-server:4.2.4-7ubuntu14:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2012-04-18 (1022 days ago)
InstallationMedia: Ubuntu-Server 10.04.4 LTS "Lucid Lynx" - Release amd64 (20120214.2)
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic root=UUID=98a82d8c-6ece-40ee-9684-ac4ff41c8aca ro quiet
SourcePackage: isc-dhcp
Title: package isc-dhcp-server 4.2.4-7ubuntu14 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to utopic on 2015-02-05 (0 days ago)
modified.conffile..etc.dhcp.dhcpd.conf: [modified]
mtime.conffile..etc.dhcp.dhcpd.conf: 2014-12-29T14:36:20.818033