Error 0x803100BD

Value: -2144272195 | 0x803100BD | 2150695101

What does it mean ?

FVE_E_SHADOW_COPY_PRESENT  
BitLocker cannot be enabled on the volume because it contains a Volume Shadow Copy. Remove all Volume Shadow Copies before encrypting the volume.
Value: 189 | 0x00BD | 0b0000000010111101

Where does it come from ?

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

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