gpg: signing failed: Bad secret key

[Leo Coogan]

Here's the command run on my fedora machine:

```

 > gpg -K  --list-options show-unusable-subkeys
/home/lcoogan/.gnupg/pubring.kbx
--------------------------------
sec   ed25519 2023-03-03 [SC] [expires: 2025-03-02]
       C0156FFBE02B4E03F7792EB53D7F617CDE5C9A9B
uid           [ultimate] Leo Coogan (Personal) 
<leocoogan at existential.beauty>
uid           [ultimate] Leo Coogan (Personal GPG key) 
<leocoogan at mailfence.com>
ssb   cv25519 2023-03-03 [E] [expires: 2025-03-02]

```

and on my nixos machine:

```

 > gpg -K  --list-options show-unusable-subkeys
gpg: enabled compatibility flags:
gpg: using pgp trust model
/home/lcoogan/.gnupg/pubring.kbx
--------------------------------
sec#  ed25519 2023-03-03 [SC] [expires: 2025-03-02]
       C0156FFBE02B4E03F7792EB53D7F617CDE5C9A9B
uid           [ultimate] Leo Coogan (Personal) 
<leocoogan at existential.beauty>
uid           [ultimate] Leo Coogan (Personal GPG key) 
<leocoogan at mailfence.com>
ssb   cv25519 2023-03-03 [E] [expires: 2025-03-02]

```

It looks like there's only that non-functioning signing subkey. Huh. Do 
I need to create a new signing subkey?

On 1/24/24 12:37, Werner Koch wrote:
> On Tue, 23 Jan 2024 12:38, Leo Coogan said:
>
>> sec#  ed25519 2023-03-03 [SC] [expires: 2025-03-02]
>>        C0156FFBE02B4E03F7792EB53D7F617CDE5C9A9B
>>        Keygrip = 38953FFD2BD558606473A90A6EDD5B26F03FA3CB
> You don't have a signing key.  Ther primary key has been taken offline
> ('#') and can thus not be used for signing.
>
>> ssb   cv25519 2023-03-03 [E] [expires: 2025-03-02]
>>        143454E3276F11C51D01B35363D14EA6FDB00D9F
>>        Keygrip = 02EE4AA6089E9DEF7792F548C01FFD8C05F1EC21
> The subkey is not capable of signing (by usage flags and algorithm).
>
> Did you had another signing subkey and that one expired?
> Add
>
>    --list-options show-unusable-subkeys
>
> to the listing command to check.
>
>
> Salam-Shalom,
>
>     Werner
>