Alter Aeon Online Help

Keywords are:  'nosave no_save unsaveable objects flags'

Certain types of objects are temporary and do not save.  This means that
if you log off holding the item, or if you put it in a storage locker, it
will be gone when you return.

Nosave items also are destroyed by a reboot.  There is no way whatsoever
to keep a nosave item across a reboot - if the item is in a shop or
donation room, it will be gone after the reboot occurs.

Items that do not save are:

Item type KEY - keys never save, and many of them also have timers.

Items flagged NOSAVE - these obviously do not save.