Error 0x8051002D

Value: -2142175187 | 0x8051002D | 2152792109

What does it mean ?

OPC_E_DS_DUPLICATE_PACKAGE_OBJECT_REFERENCES  
The signature markup contains more than one Reference element that refers to the package Object element, but only one such Reference is allowed.
Value: 45 | 0x002D | 0b0000000000101101

Where does it come from ?

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

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