Errors

valid_signature
Old SIGNATURE detected. Please inform the module author to regenerate SIGNATURE using Module::Signature version 0.82 or newer.
gpg: Signature made Thu 02 Oct 2008 02:36:23 AM JST
gpg:                using DSA key 47404BE206D8C374
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==