Errors

valid_signature

gpg: Signature made Wed 13 Dec 2023 06:59:36 AM JST
gpg:                using RSA key 6E7F61D9ACC3413A70E3E8149A792B3735D41172
gpg: requesting key 9A792B3735D41172 from hkp server keyserver.ubuntu.com
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==