Falha ao iniciar a configuração de criptografia para 0

Question

O que significa isso?
O que devo fazer para corrigir isso?

[root@MYSRV /]# systemctl status [e-mail]
● [e-mail] - Cryptography Setup for 0
     Loaded: loaded (/etc/crypttab; bad; vendor preset: disabled)
     Active: failed (Result: exit-code) since Fri 2017-01-20 22:00:05 UTC; 4min 19s ago
     Docs: man:crypttab(5)
           man:systemd-cryptsetup-generator(8)
           man:systemd-cryptsetup@.service(8)
  Process: 3176 ExecStart=/usr/lib/systemd/systemd-cryptsetup attach 0 2 * * (code=exited, status=1/FAILURE)
  Main PID: 3176 (code=exited, status=1/FAILURE)

Jan 20 22:00:05 MYSRV systemd[1]: Starting Cryptography Setup for 0...
Jan 20 22:00:05 MYSRV systemd[1]: [e-mail]: main process exited, code=exited, status=1/FAILURE
Jan 20 22:00:05 MYSRV systemd[1]: Failed to start Cryptography Setup for 0.
Jan 20 22:00:05 MYSRV systemd[1]: Unit [e-mail] entered failed state.
Jan 20 22:00:05 MYSRV systemd[1]: [e-mail] failed.