Yes. It was a device that was taken to a MVNO that no longer exists. The PLBL setting (which is normally reset by MVNOs when you leave) doesn't seem to have been reset, so trying to bring it back to any Sprint owned brand throws a PLBL error.
Just need someone who is familiar with the system to reset it.
@Syriel, we may need to create a ticket to change that, but checking the eligibility online would add the device immediately if eligible. Please give it a try and let us know if you get an error.