Error 0xC00D1247

Value: -1072885177 | 0xC00D1247 | 3222082119

What does it mean ?

NS_E_CANNOT_SYNC_PREVIOUS_SYNC_RUNNING  
Your device is operating slowly or is not responding. Until the device responds, it is not possible to sync again. To return the device to normal operation, try disconnecting it from the computer or resetting it.
Value: 4679 | 0x1247 | 0b0001001001000111

Where does it come from ?

FACILITY_MEDIASERVER  
Windows Media Server
Value: 13 | 0x00D | 0b00001101

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