Read the current 13.02 Syscon and Flash data to your PC multiple times to ensure a 1:1 perfect copy.
This process usually requires wiping the hard drive (HDD), leading to the loss of all installed games and save files. Conclusion ps4 downgrade 1302 to 900
Many users on 9.00 want to go back to 5.05 because the homebrew support is more stable on the older firmware. Read the current 13