Error 0x80310086

Value: -2144272250 | 0x80310086 | 2150695046

What does it mean ?

FVE_E_POLICY_PROHIBITS_SELFSIGNED  
BitLocker Drive Encryption cannot be applied to this drive as currently configured because of Group Policy settings. The certificate you provided for drive encryption is self-signed. Current Group Policy settings do not permit the use of self-signed certificates. Obtain a new certificate from your certification authority before attempting to enable BitLocker.
Value: 134 | 0x0086 | 0b0000000010000110

Where does it come from ?

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

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