[Gllug] Ack! Updating expiry on GPG key?

[Rev Simon Rumble]

I'm trying to update the expiry date on my GPG key.  The manual isn't
enormously helpful:
file:///usr/share/doc/gnupg-doc/GNU_Privacy_Handbook/html/management.html#AEN329

How do I _select_ the old subordinate key to delete it?

From gpg --edit-keys:

Command> list

pub  1024D/9656AF8D  created: 2001-07-30 expires: never      trust:
u/u
sub  1024g/5919BFE1  created: 2001-07-30 expires: 2002-07-30
(1). Rev Simon Rumble <simon at rumble.net>

Command> key 5919BFE1
No secondary key with index 5919

-- 
Rev Simon Rumble <simon at rumble.net>
www.rumble.net
Send email with subject "send key pub" for public key.

Remember, objects in the mirror are actually behind you

- On a helmet mounted mirror used by US cyclists
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