When you updated to 13.02, your previous firmware (potentially 13.00) moved to the inactive slot. The Catch: You can only revert to the firmware that was installed immediately
If you want a jailbreak in the future, Turn off automatic updates in your PS4 settings and disconnect it from the internet. Exploits are always found in older software that Sony has stopped patching. The lower your firmware stays, the higher your chances of a future exploit. 3. Buy a Second-Hand PS4 on Lower Firmware ps4 downgrade 13.02 to 9.00