Error 0x80EE004A

Value: -2131886006 | 0x80EE004A | 2163081290

What does it mean ?

RTC_E_DUPLICATE_BUDDY  
Buddy already exists
Value: 74 | 0x004A | 0b0000000001001010

Where does it come from ?

FACILITY_RTC_INTERFACE  
RTC - Real-time Communications
Value: 238 | 0x0EE | 0b11101110

Other Errors for FACILITY_RTC_INTERFACE