O que significa este erro de atualização?

Eu recebo este erro abaixo quando executo sudo apt-get update e sudo apt-get upgrade:

Setting up sssd-common (2.3.1-3ubuntu4) ...
Warning: found usr.sbin.sssd in /etc/apparmor.d/force-complain, forcing complain mode
Warning from /etc/apparmor.d/usr.sbin.sssd (/etc/apparmor.d/usr.sbin.sssd line 59): Caching disabled for: 'usr.sbin.sssd' due to force complain
sssd-autofs.service is a disabled or a static unit not running, not starting it.
sssd-nss.service is a disabled or a static unit not running, not starting it.
sssd-pam.service is a disabled or a static unit not running, not starting it.
sssd-ssh.service is a disabled or a static unit not running, not starting it.
sssd-sudo.service is a disabled or a static unit not running, not starting it.
A dependency job for sssd-autofs.socket failed. See 'journalctl -xe' for details.
A dependency job for sssd-nss.socket failed. See 'journalctl -xe' for details.
A dependency job for sssd-pam-priv.socket failed. See 'journalctl -xe' for details.
A dependency job for sssd-pam.socket failed. See 'journalctl -xe' for details.
A dependency job for sssd-ssh.socket failed. See 'journalctl -xe' for details.
A dependency job for sssd-sudo.socket failed. See 'journalctl -xe' for details.

Minha pergunta é esse erro perigoso ou meu computador é muito antigo e o que esse erro significa, apenas me perguntando o que não posso fazer ou o que isso significa?