Errors

valid_signature

gpg: Signature made Tue 28 Jan 2025 05:12:36 AM JST
gpg:                using RSA key EC2AAF81139ECE773070E2A2A27CDEFC7B4838F0
gpg: requesting key A27CDEFC7B4838F0 from hkp server keyserver.ubuntu.com
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==