Error 0x80EE0001

Value: -2131886079 | 0x80EE0001 | 2163081217

What does it mean ?

RTC_E_SIP_STREAM_PRESENT  
Parsing SIP failed The stream to be started is already present
Value: 1 | 0x0001 | 0b0000000000000001

Where does it come from ?

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

Other Errors for FACILITY_RTC_INTERFACE