Error 0x8004165C

Value: -2147215780 | 0x8004165C | 2147751516

What does it mean ?

QPLIST_E_DUPLICATE  
Duplicate property name.
Value: 5724 | 0x165C | 0b0001011001011100

Where does it come from ?

FACILITY_ITF  
COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

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