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Ign:8 http://deb.odroid.in/c4 bionic InRelease Err:9 http://deb.odroid.in/c4 bionic Release 404 Not Found [IP: 188.8.131.52 80] Reading package lists... Done E: The repository 'http://deb.odroid.in/c4 bionic 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.
I bet you guys know what to do!