Please help me re-jailbreak ios 9.2

hello there,
i just changed my SystemVersion.plist to ios 10.2 to download a stupid app from the app store and rebooted i used to do on my ios 9.0.2 jailbreak then i realized that’s this is a semi-untethered jailbreak so the PG Client is reading that i’m on ios 10.2 and cannot jailbreak anymore
so i’m aking if there’s any solution maybe to change the app check version or another way to jailbreak ios 9.2 spoofed to ios 10.2
please help me out guys i’d really appreciated