Yeah, as QATAR said, you'll need to downgrade with an E3 flasher.
This is the tutorial I used when I first downgraded a PlayStation 3, and it's the tutorial that I would recommend to everybody.
Unfortunately for you, there is no software only solution to downgrade your console. You will need to use a hardware flasher like the E3 Flasher.
Honestly people like this piss me off... Just do some damn research before asking questions like this.
There's no need for that we have questions and support sections for a reason. You have made threads in the past asking for help too, if you don't have something helpful to say in the questions section then don't say anything at all.
Yeah, as QATAR said, you'll need to downgrade with an E3 flasher.
This is the tutorial I used when I first downgraded a PlayStation 3, and it's the tutorial that I would recommend to everybody.
Unfortunately for you, there is no software only solution to downgrade your console. You will need to use a hardware flasher like the E3 Flasher.