```shell
Err:9 https://packagecloud.io/github/git-lfs/ubuntu jammy InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6B05F25D762E3157
Reading package lists... Done
W: GPG error: https://packagecloud.io/github/git-lfs/ubuntu jammy InRelease: The following signatures couldn't be veri fied because the public key is not available: NO_PUBKEY 6B05F25D762E3157
E: The repository 'https://packagecloud.io/github/git-lfs/ubuntu jammy InRelease' is not signed.
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.
```