Error 0x80310025

Value: -2144272347 | 0x80310025 | 2150694949

What does it mean ?

FVE_E_TPM_SRK_AUTH_NOT_ZERO  
The authorization data for the storage root key (SRK) of the Trusted Platform Module (TPM) is not zero and is therefore incompatible with BitLocker. Please initialize the TPM before attempting to use it with BitLocker.
Value: 37 | 0x0025 | 0b0000000000100101

Where does it come from ?

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

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