Error 0x800721CA

Value: -2147016246 | 0x800721CA | 2147951050

What does it mean ?

ERROR_DS_VALUE_KEY_NOT_UNIQUE  
The link value specified was not found, but a link value with that key was found.
Value: 8650 | 0x21CA | 0b0010000111001010

Where does it come from ?

FACILITY_WIN32  
Provides a way to handle error codes from functions in the Win32 API as an HRESULT. (Error codes in 16 - bit OLE that duplicated Win32 error codes have also been changed to FACILITY_WIN32)
Value: 7 | 0x007 | 0b00000111

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