Debian install / gpg key

[Manganneau Emmanuel]

Hi,

I have trouble installing kolab on a fresh debian install :


wget -q -O- https://ssl.kolabsys.com/community.asc | apt-key add -
OK


apt update
Atteint:1 http://security.debian.org stable/updates InRelease
Ign:2 http://ftp.fr.debian.org/debian stable InRelease
Atteint:3 http://ftp.fr.debian.org/debian stable Release
Ign:4 http://obs.kolabsys.com/repositories/Kolab:/16/Debian_8.0 ./ InRelease
Réception de:5 http://obs.kolabsys.com/repositories/Kolab:/16/Debian_8.0 
./ Release [982 B]
Réception de:6 http://obs.kolabsys.com/repositories/Kolab:/16/Debian_8.0 
./ Release.gpg [481 B]
Ign:6 http://obs.kolabsys.com/repositories/Kolab:/16/Debian_8.0 ./ 
Release.gpg
Lecture des listes de paquets... Fait
W: Erreur de GPG : 
http://obs.kolabsys.com/repositories/Kolab:/16/Debian_8.0 ./ Release : 
Les signatures suivantes ne sont pas valables : 
79D86A05FDE6C9FB4E43A6C5830C2BCF446D5A45
E: The repository 
'http://obs.kolabsys.com/repositories/Kolab:/16/Debian_8.0 ./ Release' 
is not signed.
N: Updating from such a repository can't be done securely, and is 
therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user 
configuration details.


Anyone have a clue ?

ps : sorry if you get this message multiple times, I used a wrong sender 
address...

-- 
|  Manganneau Emmanuel         |   GestraNet SARL       |
|  manganneau at gestranet.net    |   tel : 06 64 09 73 07 |
`-------------------------------------------------------'