Error 0x8051001C

Value: -2142175204 | 0x8051001C | 2152792092

What does it mean ?

OPC_E_DS_INVALID_SIGNATURE_ORIGIN_RELATIONSHIP  
A package relationship of type digital signature origin is targeting a location that is external to the package. Digital Signature Origin parts must be located internally. For more information about this relationship type, see the OPC.
Value: 28 | 0x001C | 0b0000000000011100

Where does it come from ?

FACILITY_OPC  
Open Connectivity Service (Package Consumption)
Value: 81 | 0x051 | 0b01010001

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