I am getting the error while updating the system. Please let me know why this is happening.
Err:8 http://archive.ubuntu.com/ubuntu disco-security Release
404 Not Found [IP: 2001:67c:1360:8001::23 80]
Reading package lists... Done
E: The repository 'http://archive.ubuntu.com/ubuntu disco Release' does not have a Release file.
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.