when i try to create a new world in a modpack this error shows up, how i fix it?

[totoni]

The game crashed whilst exception generating new chunk Error: java.lang.IllegalStateException: Feature order cycle found, involved sources: [Reference{ResourceKey[minecraft:worldgen/biome / duneons:creeping_winter]=net.minecraft.world.level.biome.Biome@666b1df}, Reference{ResourceKey[minecraft:worldgen/biome / minecraft:frozen_ocean]=net.minecraft.world.level.biome.Biome@3579e402}]

[warjort]

The duneons mod (and probably some another unmentioned mod) has caused a conflict in the biome blending.

See this link for more information on the problem you are having and the cyanide mod that can help you get more information: 

https://misode.github.io/guides/feature-order-cycle/

 

You should check you have the latest version of the duneons mod and then contact the mod author.