Migration from 15.04 to 15.10 failed

2016-04-15 00:28:05,516 DEBUG Comparing 3.19.0-15 with 3.19.0-15
2016-04-15 00:28:05,737 INFO installing linux metapackage: linux-generic
2016-04-15 00:28:05,737 DEBUG Installing 'linux-generic' (linux metapackage may have been accidentally uninstalled)
2016-04-15 00:28:06,024 DEBUG Marking 'ubuntu-desktop' for upgrade
2016-04-15 00:28:07,491 WARNING Can't mark 'ubuntu-desktop' for upgrade (E:Impossible de corriger les problèmes, des paquets défectueux sont en mode « garder en l'état ».)
2016-04-15 00:28:07,492 DEBUG Marking 'ubuntu-mate-desktop' for upgrade
2016-04-15 00:28:07,995 WARNING Can't mark 'ubuntu-mate-desktop' for upgrade (E:Erreur, pkgProblem::Resolve a généré des ruptures, ce qui a pu être causé par les paquets devant être gardés en l'état.)
2016-04-15 00:28:08,117 DEBUG blacklist expr 'ubuntu-minimal' matches 'ubuntu-minimal'
2016-04-15 00:28:08,117 DEBUG The package 'ubuntu-minimal' is marked for removal but it's in the removal blacklist
2016-04-15 00:28:08,180 ERROR Dist-upgrade failed: 'Le paquet « ubuntu-minimal » est marqué pour suppression mais il est dans la liste noire des suppressions.'
2016-04-15 00:28:08,181 DEBUG abort called
2016-04-15 00:28:08,183 DEBUG openCache()
2016-04-15 00:28:08,183 DEBUG failed to SystemUnLock() (E:Non verrouillé)
2016-04-15 00:28:12,399 DEBUG /openCache(), new cache size 76616
2016-04-15 00:28:12,399 DEBUG enabling apt cron job

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ubuntu-release-upgrader-core 1:15.04.14.3
ProcVersionSignature: Ubuntu 3.19.0-15.15-lowlatency 3.19.3
Uname: Linux 3.19.0-15-lowlatency x86_64
NonfreeKernelModules: wl
ApportVersion: 2.17.2-0ubuntu1.8
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Fri Apr 15 00:19:36 2016
InstallationDate: Installed on 2015-04-18 (362 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to vivid on 2016-04-14 (0 days ago)