whenever i try to get updates i keep getting this error belowplease how do i resolve this issue . i have tried all i know my current OS version is ubuntu 23.04 lunar lobster
sudo apt-get updateThe following signatures couldn't be verified because the public key is not available: NO_PUBKEY 23E7166788B63E1EHit:9 https://linux.teamviewer.com/deb stable InRelease Get:10 http://archive.ubuntu.com/ubuntu lunar-updates/main amd64 Packages [503 kB]Get:11 http://archive.ubuntu.com/ubuntu lunar-updates/main amd64 DEP-11 Metadata [81.3 kB]N: See apt-secure(8) manpage for repository creation and user configuration details.W: http://archive.ubuntu.com/ubuntu/dists/lunar-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/yarn.gpg are ignored as the file is not readable by user '_apt' executing apt-key.