Error 0x8004102A

Value: -2147217366 | 0x8004102A | 2147749930

What does it mean ?

SYNC_E_CONSTRAINT_CONFLICT_NOT_ALLOWED  
A constraint conflict is not allowed for the current save action.
Value: 4138 | 0x102A | 0b0001000000101010

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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