Err:7 https://dl.yarnpkg.com/debian stable InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E074D16EB6FF4DE3
Reading package lists... Done
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://dl.yarnpkg.com/debian stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E074D16EB6FF4DE3
W: Failed to fetch https://dl.yarnpkg.com/debian/dists/stable/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E074D16EB6FF4DE3
W: Some index files failed to download. They have been ignored, or old ones used instead.