Error 0x80040302

Value: -2147220734 | 0x80040302 | 2147746562

What does it mean ?

FHCFG_E_CONFIG_ALREADY_EXISTS  
Configuration Manager: The Config File already exists
Value: 770 | 0x0302 | 0b0000001100000010

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

Other Errors for FACILITY_ITF