HCI Upsert Odata into

Dear SAP Expert,

Good Day

I need your advise regarding my situation below.

here is design in HCI that i have

what i want is

i want move the data from successfactors into other object in successfactors

example

FoPayGrade into custom mdf FoPayGrade

i have insert the query in successfactors like this

SELECT externalCode, description, name FROM FO_payGrade

and then i try to message mapping with elemet like below

and the last one i try to connect the other object that i want

and then i got this error

Error Details com.sap.gateway.core.ip.component.odata.exception.OsciException: UPDATE_ENTRY : failed with error. Message = The structure of the payload is incorrect. For Create/Merge/Update the payload must contain a SINGLE valid entity representation

the question is1. how can i do to fix ? my scenario only query data from object fopaygrade and then update into custom fopay grade with the query that i have before