10.50 To 9.00: Ps4 Downgrade

Sony’s update infrastructure is designed with anti-rollback mechanisms. Once the system’s internal “fuses” (e-fuses) are blown during an update, the bootloader permanently records that a higher version has been installed. The console will refuse to install any firmware lower than the highest ever installed.

To be absolutely clear:

"I accidentally updated to 10.50. Can I go back to 9.00?" ps4 downgrade 10.50 to 9.00