How do i upgrade My mod to 1.18 from 1.16.5 without everything becoming an error

So, I have this mod called advanced Java and I would like to upgrade it to 1.18 but everytime everything becomes an error that i can't fix and i would have to delete it. Currently its still for 1.16.5 but i woudl like it for it to be for newer versions to is there any way to fix this?