do-release-upgrade fails to upgrade 14.04 to 15.10

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do-release-upgrade fails to upgrade 14.04 to 15.10

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-76.120-generic 3.13.11-ckt30
Uname: Linux 3.13.0-76-generic i686
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: i386
CrashDB: ubuntu
Date: Sun Jan 24 18:41:03 2016
InstallationDate: Installed on 2010-08-07 (1995 days ago)
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
PackageArchitecture: all
ProcEnviron:
 TERM=screen
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-01-24 (0 days ago)
mtime.conffile..etc.update.manager.release.upgrades: 2016-01-24T17:57:11.922112