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 22 Jan 2015 01:13:42 PM JST
gpg:                using DSA key 19C981A111F63186
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==