I'm new to ubuntu and i accidently some settings in Softwares and Updates.
Now I'm getting the following error:
E: Conflicting values set for option Signed-By regarding source http://security.ubuntu.com/ubuntu/ mantic-security: /usr/share/keyrings/ubuntu-archive-keyring.gpg !=
E: The list of sources could not be read.
Here is the list of my keyrings:
NEMESIS:~$ cd /usr/share/keyrings
NEMESIS:/usr/share/keyrings$ ls
ubuntu-archive-keyring.gpg
ubuntu-master-keyring.gpg
ubuntu-pro-esm-apps.gpg
ubuntu-pro-ros.gpg
ubuntu-archive-removed-keys.gpg
ubuntu-pro-anbox-cloud.gpg
ubuntu-pro-esm-infra.gpg
ubuntu-cloudimage-keyring.gpg
ubuntu-pro-cc-eal.gpg
ubuntu-pro-fips.gpg
ubuntu-cloudimage-removed-keys.gpg
ubuntu-pro-cis.gpg
ubuntu-pro-realtime-kernel.gpg
Please help me!!
