[SOLVED] removing Element

[die.boer]

installed Element like this

sudo apt install -y wget apt-transport-https

sudo wget -O /usr/share/keyrings/element-io-archive-keyring.gpg https://packages.element.io/debian/element-io-archive-keyring.gpg

echo "deb [signed-by=/usr/share/keyrings/element-io-archive-keyring.gpg] https://packages.element.io/debian/ default main" | sudo tee /etc/apt/sources.list.d/element-io.list

sudo apt update

sudo apt install element-desktop

then decided i didn't want it ,and "completely removed" it with Synaptic.(the desktop and the keyring options)

now when i want to check for updates with Discover. i get this message:

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. OpenPGP signature verification failed: https://packages.element.io/debian default InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C2850B265AC085BD

E: https://packages.element.io/debian default InRelease is not (yet) available (The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C2850B265AC085BD) 

how to get rid of message?

[claydoh]

Look for and delete the added apt repo you created during the install process, in Discover's settings. If you don't see anything there, you'll want to use the Software Sources tool. Get to that via the Driver Manager in System Settings or by running sudo software-properties-qt

Or you can manually delete the apt repo file you created during the install process. It will be in /etc/apt/sources.list.d/

If the name of the specific file isn't obvious, you can look at your steps and see. It will be a .list file or .sources:

echo "deb [signed-by=/usr/share/keyrings/element-io-archive-keyring.gpg] https://packages.element.io/debian/ default main" | sudo tee /etc/apt/sources.list.d/element-io.list

So: /etc/apt/sources.list.d/element-io.list

Normally you'd just disable it in Discover or delete the entry in Software Sources, but a bug in the Packagkit apt-backend breaks Discover's ability to show the entries, which also hides the button to open the Software Sources tool.

[die.boer]

thanks for the reply , i got right eventually it's basically the same you suggested
i used

sudo rm /etc/apt/sources.list.d/element-io.list

,

sudo rm /usr/share/keyrings/element-io-archive-keyring.gpg

,

sudo apt update

anyway ,fixed now thanks