error with apt-get update

Posted on Author Kodi Community Forum - All Forums

hi guys I’ve got this error with kodi repo when I do an apt-get update

Code:
Erreur de GPG : http://ppa.launchpad.net/team-xbmc/ppa/ubuntu xenial InRelease : Les signatures suivantes n'ont pas pu être vérifiées car la clé publique n'est pas disponible : NO_PUBKEY 6D975C4791E7EE5E
W: The repository 'http://ppa.launchpad.net/team-xbmc/ppa/ubuntu xenial InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.

and this is my sources.list for kodi

Code:
deb http://ppa.launchpad.net/team-xbmc/ppa/ubuntu xenial main
deb-src http://ppa.launchpad.net/team-xbmc/ppa/ubuntu xenial main

how can I fix this?

thank u