Question

The repository 'https://repos.insights.digitalocean.com/apt/do-agent main InRelease' is no longer signed.

I can’t update/upgrade. How do I fix this?

root@starfish:~# apt-get update && apt-get upgrade -y
Hit:1 http://mirrors.digitalocean.com/ubuntu bionic InRelease
Err:2 https://repos.insights.digitalocean.com/apt/do-agent main InRelease                               
  400  Bad Request [IP: <SNIP> 443]
Hit:3 http://mirrors.digitalocean.com/ubuntu bionic-updates InRelease                                   
Hit:4 http://mirrors.digitalocean.com/ubuntu bionic-backports InRelease                                 
Get:5 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]                             
Hit:6 http://ppa.launchpad.net/ondrej/php/ubuntu bionic InRelease                                       
Hit:7 http://ppa.launchpad.net/wordops/nginx-wo/ubuntu bionic InRelease                                 
Get:8 http://mariadb.mirrors.ovh.net/MariaDB/repo/10.3/ubuntu bionic InRelease [6,265 B]                
Reading package lists... Done                      
E: Failed to fetch https://repos.insights.digitalocean.com/apt/do-agent/dists/main/InRelease  400  Bad Request [IP: <SNIP> 443]
E: The repository 'https://repos.insights.digitalocean.com/apt/do-agent main InRelease' is no longer 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.
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This comment has been deleted

@AHA I’m seeing this same error on a nearly brand-new Ubuntu droplet:

# apt-get update
Hit:1 http://security.ubuntu.com/ubuntu focal-security InRelease                                                               
Get:2 https://repos.insights.digitalocean.com/apt/do-agent main InRelease [5132 B]                                             
Get:3 http://mirrors.digitalocean.com/ubuntu focal InRelease [265 kB]                   
Hit:4 http://mirrors.digitalocean.com/ubuntu focal-updates InRelease
Hit:5 http://mirrors.digitalocean.com/ubuntu focal-backports InRelease
Err:2 https://repos.insights.digitalocean.com/apt/do-agent main InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY DE88104AA4C6383F
Reading package lists... Done
W: GPG error: https://repos.insights.digitalocean.com/apt/do-agent main InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY DE88104AA4C6383F
E: The repository 'https://repos.insights.digitalocean.com/apt/do-agent main InRelease' 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.

Is there a known fix? I can just try a new droplet if not.