KawaiiSauce

Whenever i start Minecraft forge, it crashes, i have tried deleting the versions folder, and deleting it from the libraries>net>minecraftforge, and then reinstalling the recommended 1.12.2 version of forge, but it still crashes, my logs > https://pastebin.com/h7Ay5j4b Screenshot of the error message and my forge version attatched edit: just saw its not supported, but i really need to use mods from 1.12.2 mc, so please, help out