Error 0x80651000

Value: -2140860416 | 0x80651000 | 2154106880

What does it mean ?

E_BLUETOOTH_ATT_UNKNOWN_ERROR  
An error that lies in the reserved range has been received.
Value: 4096 | 0x1000 | 0b0001000000000000

Where does it come from ?

FACILITY_BLUETOOTH_ATT  
Bluetooth ATT (Attribute Protocol)
Value: 101 | 0x065 | 0b01100101

Other Errors for FACILITY_BLUETOOTH_ATT