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 Sun 24 Apr 2016 04:10:27 AM JST
gpg:                using RSA key F202971DA4A79E2C
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==