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Using `Also=` means that the target unit will also be installed/uninstalled together with our unit. Doing `Also=multi-user.target` essentially says: disable `multi-user.target` if `io.podman.socket` is disabled, which sounds... not at all like what we want. In practice, systemd thankfully ignores this (likely because it's the default target). I think having `Also=io.podman.socket` in the `io.podman.service` already does what we want here: it gets installed under `sockets.target` whenever the service is. (And the fact that systemd ignored this means that it wasn't actually playing a role in resolving #3998.) This was causing `systemctl preset-all` to dump core in Fedora CoreOS: https://github.com/coreos/fedora-coreos-tracker/issues/290 (Likely there's a systemd bug around here too.) Signed-off-by: Jonathan Lebon <jonathan@jlebon.com>