ADF5902 register 7 - master reset

Hi, the step 1 in the intialization sequence says to write 0x02000007 in R7, this means that the MSB of this register is 00000010

but the adf5902 datasheet pag 23 says that DB24 is reserved and should be 1 but in the initialization sequence they are writing 0, why?

what is the correct configuration, the initialization sequence or the register 7 info in page 23?

Thanks