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 Feb 2017 06:51:15 AM JST
gpg:                using DSA key D8B4918C1EC76AC47BA2083D6B838740014CD747
gpg: Can't check signature: No public key