我正在尝试恢复在远程 ftp 服务器上进行的备份，但遇到了问题，因为备份是使用不同的 gpg 密钥进行的，然后增量备份是使用第二个 gpg 密钥进行的。我得到了
/usr/local/bin/ftplicity backup restore /home
Start ftplicity v1.4.2.1, time is 05/05/15 10:41:35.
Using profile '/root/.ftplicity/backup'.
Using installed duplicity version 0.6.18, gpg 1.4.12 (Home: ~/.gnupg)
Test - Encryption with key 12345678 (OK)
Test - Decryption with key 12345678 (OK)
Test - Compare Original w/ Decryption (OK)
Cleanup - Delete '/tmp/ftplicity.25274.1430815295_*'(OK)
--- Start running command RESTORE (10:41:35.239) ---
Running duplicity - FAILED (code 22)
Output: NcFTP version is 3.2.5
Local and Remote metadata are synchronized, no sync needed.
Last full backup date: Tue Oct 1 20:42:41 2013
Volume was signed by key 87654321, not 12345678
--- Finished (10:41:52.348) - Runtime 00:00:17.108 ---
我有两个 gpg 密钥，但使用这个：12345678 密钥，但之前我使用的是 87654321，现在我无法恢复备份。
备份正常进行，但由于以下原因，恢复或从备份中简单提取文件时出现问题
Volume was signed by key 87654321, not 12345678
让我知道