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UEFI Boots from HDD via boot option, but not the HDD’s boot option

I have two boot options representing my HDD, one is “Debian,” which boots off my HDD normally and launches Debian. The other is “HDD0,” which instantly fails to boot (Under a second) and takes me back to the boot selection screen when attempting to launch with it.

I’m pretty sure this is related to my ESP folder (which is mounted as /boot/efi/EFI for me), which contains two folders: “Debian” and “GRUB.” They seem to both have the 4 .efi files that the specification demands for a boot option. Is my installation missing a default boot option for the HDD itself? I couldn’t find info on it in the specification.