Error 0x803100D8

Value: -2144272168 | 0x803100D8 | 2150695128

What does it mean ?

FVE_E_PROTECTION_CANNOT_BE_DISABLED  
BitLocker can't be suspended on this drive until the next restart.
Value: 216 | 0x00D8 | 0b0000000011011000

Where does it come from ?

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

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