Unable to handle 0x0600 event

C:\Codes\BLE>python SensorTag_Central_HCI.py
Biscuit Central via HCI
## Discovery...

-Type        : 0x04
-EventCode   : 0xFF
-Data Length : 0x06
 Event       : 0x067F
 Status      : 0x00
GAP_HCI_ExtentionCommandStatus
##  OpCode     : 0xFE00

-Type        : 0x04
-EventCode   : 0xFF
-Data Length : 0x2C
 Event       : 0x0600
 Status      : 0x00
1536
 -> Not handled yet.
Discovery...
