Error 0x80510015

Value: -2142175211 | 0x80510015 | 2152792085

What does it mean ?

OPC_E_DUPLICATE_PIECE  
A piece with the same piece number already exists in the current package. Pieces are a result of interleaved parts. If the Packaging API is used to consume a package that supports interleaving, this error may result. The Packaging API does not support the production of packages that have interleaved parts. For more information about interleaving, see the OPC.
Value: 21 | 0x0015 | 0b0000000000010101

Where does it come from ?

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

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Other Errors for FACILITY_OPC