Error 0x80310062

Value: -2144272286 | 0x80310062 | 2150695010

What does it mean ?

FVE_E_POLICY_STARTUP_KEY_NOT_ALLOWED  
Group Policy settings do not permit the use of a startup key. Please choose a different BitLocker startup option.
Value: 98 | 0x0062 | 0b0000000001100010

Where does it come from ?

FACILITY_FVE  
Full volume encryption
Value: 49 | 0x031 | 0b00110001

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