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 Tue 23 Dec 2014 06:30:17 AM JST
gpg:                using DSA key 4F0AA06FB631877C
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==