Error 0x803100B0

Value: -2144272208 | 0x803100B0 | 2150695088

What does it mean ?

FVE_E_EDRIVE_BAND_IN_USE  
The drive cannot be managed by BitLocker because the drive's hardware encryption feature is already in use.
Value: 176 | 0x00B0 | 0b0000000010110000

Where does it come from ?

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

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