Correted energy of Ni bulk

I optimize the lattice constant of Ni bulk (fcc) using the same POSCAR, INCAR setting, XC functional (Ni_pv), and k-mesh as listed in the page of The calculated energy per Ni atom is -5.49 eV, which is about 0.3 eV larger than -5.78 eV as provided by MP. Moreover, I have checked this calculation using different VASP versions and the calculted values are the same. Because this difference (~0.3 eV) is a bit larger as an average value, could you please tell me the details for this calculation in MP.
Thank you in advance!