Possible Duplicate:
How do I fix the GPG error “NO_PUBKEY”?
After todays update, I restarted my system and got this message:
When I check for updates it says that there are no updates available, and that last update was 7 days ago, which is not true since I updated today.
What should I do?
After running sudo apt-get update && sudo apt-get upgrade I can see the following error:
Fetched 173 kB in 11s (15.4 kB/s)
Reading package lists... Done
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repository.spotify.com stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 082CCEDF94558F59
W: Failed to fetch http://repository.spotify.com/dists/stable/InRelease
