Error 0x80040E99

Value: -2147217767 | 0x80040E99 | 2147749529

What does it mean ?

DB_E_DUPLICATECONSTRAINTID  
Constraint already exists.
Value: 3737 | 0x0E99 | 0b0000111010011001

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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