"skipped: Unusable public key"

[Ayoub Misherghi]

Not obvious to me why that is happening:


ayoub at vboxpwfl:~/testdir$ ls

textfile


ayoub at vboxpwfl:~/testdir$ gpg -r sentry -e textfile

gpg: sentry: skipped: Unusable public key
gpg: textfile: encryption failed: Unusable public key



ayoub at vboxpwfl:~/testdir$ gpg --list-keys

/home/ayoub/.gnupg/pubring.kbx
------------------------------
pub   ed25519 2020-07-09 [SC] [expires: 2020-09-25]
       3C5B212A55B966881E2D2718A45398B520BEE91E
uid           [ultimate] sentry

pub   ed25519 2020-07-09 [SC] [expires: 2021-07-09]
       7A675D7F52BC905C22F8249091556BC29D4C595E
uid           [ultimate] develop1
sub   cv25519 2020-07-09 [E] [expires: 2021-07-09]



ayoub at vboxpwfl:~/testdir$ gpg --list-secret-keys
/home/ayoub/.gnupg/pubring.kbx
------------------------------
sec   ed25519 2020-07-09 [SC] [expires: 2020-09-25]
       3C5B212A55B966881E2D2718A45398B520BEE91E
uid           [ultimate] sentry

sec   ed25519 2020-07-09 [SC] [expires: 2021-07-09]
       7A675D7F52BC905C22F8249091556BC29D4C595E
uid           [ultimate] develop1
ssb   cv25519 2020-07-09 [E] [expires: 2021-07-09]

ayoub at vboxpwfl:~/testdir$