gpg 不允許我更改密碼

我想更改我的 gpg 密碼，所以我這樣做了

tweedleburg:~/.gnupg # gpg --list-secret-keys
/root/.gnupg/secring.gpg
------------------------
sec   1024D/43E855BB 2008-02-03
uid                  Thorsten Staerk <Thorsten@Staerk.de>
ssb   2048g/2220D430 2008-02-03

所以我確實有一個密鑰和一個使用者 ID。但是 gpg 不接受它：

tweedleburg:~/.gnupg # gpg --passwd
gpg (GnuPG) 2.0.26; Copyright (C) 2013 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

usage: gpg [options] --passwd <user-id>
tweedleburg:~/.gnupg # gpg --passwd Thorsten@Staerk.de
gpg (GnuPG) 2.0.26; Copyright (C) 2013 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

gpg: error changing the passphrase for `Thorsten@Staerk.de': No secret key

我究竟做錯了什麼？

指定數字 id：

gpg --passwd 43E855BB

引用自：https://unix.stackexchange.com/questions/215141