trying to launch a modded smp: and it shows that "Missing mandatory dependencies: forge"

[atlasscript]

we've been on and off removing mods one by one checking to see if the server wont crash.
heres the entire log:
https://mclo.gs/kIEk43b

and the full log in the title states that:

[main/ERROR] [net.minecraftforge.fml.loading.ModSorter/LOADING]: Missing mandatory dependencies: forge

[atlasscript]

how would we know which mod requires a different version of forge?

 

[atlasscript]

will do thanks