package iw 3.17-1 failed to install/upgrade: package iw is already installed and configured

[luciano]

impossible to upgrade from ubuntu 16.04 LTS to Ubuntu 18.04 LTS :
"impossible de charger la liste des paquets"
"no priority (or zero) specified for pin"

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: iw 3.17-1
ProcVersionSignature: Ubuntu 4.4.0-210.242-generic 4.4.262
Uname: Linux 4.4.0-210-generic i686
ApportVersion: 2.20.9-0ubuntu7.27
AptdaemonVersion: 1.1.1+bzr982-0ubuntu19.5
Architecture: i386
CrashReports:
 600:0:116:1325918:2021-12-23 18:03:45.625630855 +0100:2021-12-23 18:03:46.625630855 +0100:/var/crash/iw.0.crash
 640:1000:116:70500:2021-12-23 17:40:57.094844579 +0100:2021-12-23 17:40:58.094844579 +0100:/var/crash/_usr_bin_gnome-software.1000.crash
 600:0:116:1326968:2021-12-23 18:03:46.025632619 +0100:2021-12-23 18:03:47.025632619 +0100:/var/crash/crda.0.crash
 600:0:116:1325973:2021-12-23 18:03:46.245628860 +0100:2021-12-23 18:03:40.993602817 +0100:/var/crash/wireless-regdb.0.crash
Date: Thu Dec 23 18:03:46 2021
ErrorMessage: package iw is already installed and configured
InstallationDate: Installed on 2021-07-31 (145 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release i386 (20160420.1)
Python3Details: /usr/bin/python3.6, Python 3.6.9, python3-minimal, 3.6.7-1~18.04
PythonDetails: /usr/bin/python2.7, Python 2.7.17, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2.3
 apt 1.6.14
SourcePackage: dpkg
Title: package iw 3.17-1 failed to install/upgrade: package iw is already installed and configured
UpgradeStatus: Upgraded to bionic on 2021-12-23 (0 days ago)