Serial #: To be filled by O.E.M. | When is this happening?

Still trying to backup Windows 10 I checked my Microsoft account to make sure this device was registered to find
(I named the device LP):

LP
To be filled by O.E.M.
Serial #: To be filled by O.E.M.
Windows 10 Core (10.0.14393.105)
-------- the LP device is listed as a tablet ---------

On a real computer named Gate:
Gate FX6801
• Serial #: xxxxxxxxxxxxxxxxxxxx
• Windows 10 Professional (10.0.14393.105)