not possible to up grade

[Giampiero]

message : package corrupted

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8 [origin: unknown]
ProcVersionSignature: Ubuntu 4.4.0-31.50~14.04.1-generic 4.4.13
Uname: Linux 4.4.0-31-generic i686
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: i386
CrashDB: ubuntu
Date: Sat Sep 23 14:25:58 2017
InstallationDate: Installed on 2017-09-10 (12 days ago)
InstallationMedia: Ubuntu 14.04.5 LTS "Trusty Tahr" - Release i386 (20160803)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=it
 PATH=(custom, no user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2017-09-23 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2017-09-23 14:05:44.184479
 Log time: 2017-09-23 14:06:40.229588
 Log time: 2017-09-23 14:07:39.847714
 Log time: 2017-09-23 14:26:22.061683
VarLogDistupgradeTermlog:

[Giampiero (jmtexsrl)]

????