Dear Marc, this issue has also happened on an upgrade to atop 2.24 once. But I didn´t see it on any upgrade after that anymore. I do not know whether it can happen again on an upgrade.
merkaba:~#100> LANG=C apt dist-upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue? [Y/n] Setting up atop (2.2.4-1~exp1) ... Failed to preset unit: File /etc/systemd/system/multi-user.target.wants/ atop.service already exists. /usr/bin/deb-systemd-helper: error: systemctl preset failed on atop.service: No such file or directory Job for atopacct.service failed because of unavailable resources or another system error. See "systemctl status atopacct.service" and "journalctl -xe" for details. invoke-rc.d: initscript atopacct, action "start" failed. […] (see atop: /run/pacct_shadow.d: File exists on restarting atopacctd on upgrade https://bugs.debian.org/842136 for the issue why atopacct didn´t start properly) Thanks, -- Martin