

The naming convention looks suspiciously like an autogenerated (dynamic) unit; one typically sees these from /etc/fstab being parsed at boot by systemd-fstab-generator into /run/systemd/.
Try perusing https://www.freedesktop.org/software/systemd/man/latest/systemd.generator.html and /run/systemd/ on your system, see if anything catches your eye…




It’s probably most effective at this point to add
systemd.log_level=debug systemd.log_target=kmsgto the kernel boot options to ferret out what’s creating it then go from there