Stretch gpg (GnuPG) 2.1.18環境でJessie gpg (GnuPG) 2.0.26の情報が表示されない

DBとなる.gnupgはコピーしたのだが表示が異なる

Jessie gpg (GnuPG) 2.0.26:
$ gpg --fingerprint 
/home/user/.gnupg/pubring.gpg
---------------------------------
pub

Stretch gpg (GnuPG) 2.1.18:
$ gpg --fingerprint 
$

Jessie gpg (GnuPG) 2.0.26:$ md5sum .gnupg/*
c1f5aa175d698aa21afab45c726da125  .gnupg/gpg.conf
md5sum: .gnupg/private-keys-v1.d: ディレクトリです
01e9ebba8964e2cf0e2f5234cff0fe8d  .gnupg/pubring.gpg
01e9ebba8964e2cf0e2f5234cff0fe8d  .gnupg/pubring.gpg~
bef2c7d660ef31ce2e3b6087183842c2  .gnupg/random_seed
ed18992bd4559356cc55458a61ca34a6  .gnupg/secring.gpg
1af18ab5975a5d2e5124c6fc9885b50d  .gnupg/trustdb.gpg

Stretch gpg (GnuPG) 2.1.18:$ md5sum .gnupg/*
c1f5aa175d698aa21afab45c726da125  .gnupg/gpg.conf
md5sum: .gnupg/private-keys-v1.d: Is a directory
01e9ebba8964e2cf0e2f5234cff0fe8d  .gnupg/pubring.gpg
01e9ebba8964e2cf0e2f5234cff0fe8d  .gnupg/pubring.gpg~
4dc508465db924149fc8dce673f3908d  .gnupg/pubring.kbx
bef2c7d660ef31ce2e3b6087183842c2  .gnupg/random_seed
ed18992bd4559356cc55458a61ca34a6  .gnupg/secring.gpg
1af18ab5975a5d2e5124c6fc9885b50d  .gnupg/trustdb.gpg

結論

rm .gnupg/pubring.kbx

で表示されるようになった。

参考
https://lists.gnupg.org/pipermail/gnupg-users/2015-December/054881.html
https://wiki.archlinuxjp.org/index.php/GnuPG