Comment 1 for bug 1777710

what are the permissions of /home/psusi ? and /home/psusi/.gnupg ?

it is not safe if .gnupg; or the directory that contains it; are group|other writable.

new gpg uses keybox, whilst old gpg uses pub/secring.gpg. whenever new gpg was first executed against this .gnupg the old secring got auto converted to a keybox and from that point on the secrings & keybox no longer maintained in sync.

Please check .gnupg/private-keys-v1.d/* folder and if that contains expected subkeys. If not try to use old gpg to export the subkeys; and re-import them with a new gpg, such that they migrate into the keybox structure.