Error 0x803100AC

Value: -2144272212 | 0x803100AC | 2150695084

What does it mean ?

FVE_E_NO_TPM_WITH_PASSPHRASE  
A TPM key protector cannot be added because a password protector exists on the drive.
Value: 172 | 0x00AC | 0b0000000010101100

Where does it come from ?

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

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