Error 0x8004503F

Value: -2147200961 | 0x8004503F | 2147766335

What does it mean ?

SPERR_AMBIGUOUS_PROPERTY  
Cannot add ambiguous property.
Value: 20543 | 0x503F | 0b0101000000111111

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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