Error 0x80310030

Value: -2144272336 | 0x80310030 | 2150694960

What does it mean ?

FVE_E_BOOTABLE_CDDVD  
BitLocker Drive Encryption detected bootable media (CD or DVD) in the computer. Remove the media and restart the computer before configuring BitLocker.
Value: 48 | 0x0030 | 0b0000000000110000

Where does it come from ?

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

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