Feature Cycle Conflict With Vanilla Biomes

[UdderlyEvelyn]

This is in my modpack, so this isn't necessarily a pure vanilla issue, but it is happening between BWG and vanilla biomes. I knew about feature recycler already so I popped that in and it sorted it and this is its output:

[13:39:51] [Worker-Main-16/INFO]: Starting feature recycler... [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:brown_mushroom_taiga" from index 4 to index 6 for biome "biomeswevegone:frosted_coniferous_forest". Placed Feature index rules set by biome "minecraft:old_growth_spruce_taiga". [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:patch_grass_taiga" from index 6 to index 4 for biome "biomeswevegone:frosted_coniferous_forest". Placed Feature index rules set by biome "minecraft:old_growth_spruce_taiga". [13:39:53] [Worker-Main-16/WARN]: Just prevented a crash between biomeswevegone and minecraft! Please report the issues to their respective issue trackers. [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:brown_mushroom_taiga" from index 4 to index 7 for biome "biomeswevegone:frosted_coniferous_forest". Placed Feature index rules set by biome "minecraft:old_growth_spruce_taiga". [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:patch_dead_bush" from index 7 to index 4 for biome "biomeswevegone:frosted_coniferous_forest". Placed Feature index rules set by biome "minecraft:old_growth_spruce_taiga". [13:39:53] [Worker-Main-16/WARN]: Just prevented a crash between biomeswevegone and minecraft! Please report the issues to their respective issue trackers. [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:red_mushroom_taiga" from index 5 to index 6 for biome "biomeswevegone:frosted_coniferous_forest". Placed Feature index rules set by biome "minecraft:mushroom_fields". [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:brown_mushroom_taiga" from index 6 to index 5 for biome "biomeswevegone:frosted_coniferous_forest". Placed Feature index rules set by biome "minecraft:mushroom_fields". [13:39:53] [Worker-Main-16/WARN]: Just prevented a crash between biomeswevegone and minecraft! Please report the issues to their respective issue trackers. [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:red_mushroom_taiga" from index 5 to index 7 for biome "biomeswevegone:frosted_coniferous_forest". Placed Feature index rules set by biome "minecraft:mushroom_fields". [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:brown_mushroom_taiga" from index 7 to index 5 for biome "biomeswevegone:frosted_coniferous_forest". Placed Feature index rules set by biome "minecraft:mushroom_fields". [13:39:53] [Worker-Main-16/WARN]: Just prevented a crash between biomeswevegone and minecraft! Please report the issues to their respective issue trackers. [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:brown_mushroom_taiga" from index 4 to index 6 for biome "biomeswevegone:coniferous_forest". Placed Feature index rules set by biome "minecraft:old_growth_spruce_taiga". [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:patch_grass_taiga" from index 6 to index 4 for biome "biomeswevegone:coniferous_forest". Placed Feature index rules set by biome "minecraft:old_growth_spruce_taiga". [13:39:53] [Worker-Main-16/WARN]: Just prevented a crash between biomeswevegone and minecraft! Please report the issues to their respective issue trackers. [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:brown_mushroom_taiga" from index 4 to index 7 for biome "biomeswevegone:coniferous_forest". Placed Feature index rules set by biome "minecraft:old_growth_spruce_taiga". [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:patch_dead_bush" from index 7 to index 4 for biome "biomeswevegone:coniferous_forest". Placed Feature index rules set by biome "minecraft:old_growth_spruce_taiga". [13:39:53] [Worker-Main-16/WARN]: Just prevented a crash between biomeswevegone and minecraft! Please report the issues to their respective issue trackers. [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:red_mushroom_taiga" from index 5 to index 6 for biome "biomeswevegone:coniferous_forest". Placed Feature index rules set by biome "minecraft:mushroom_fields". [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:brown_mushroom_taiga" from index 6 to index 5 for biome "biomeswevegone:coniferous_forest". Placed Feature index rules set by biome "minecraft:mushroom_fields". [13:39:53] [Worker-Main-16/WARN]: Just prevented a crash between biomeswevegone and minecraft! Please report the issues to their respective issue trackers. [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:red_mushroom_taiga" from index 5 to index 7 for biome "biomeswevegone:coniferous_forest". Placed Feature index rules set by biome "minecraft:mushroom_fields". [13:39:53] [Worker-Main-16/WARN]: Moved placed feature "minecraft:brown_mushroom_taiga" from index 7 to index 5 for biome "biomeswevegone:coniferous_forest". Placed Feature index rules set by biome "minecraft:mushroom_fields". [13:39:53] [Worker-Main-16/WARN]: Just prevented a crash between biomeswevegone and minecraft! Please report the issues to their respective issue trackers. [13:39:56] [Worker-Main-16/INFO]: Finished recycling features. Took 4741ms [13:39:56] [Worker-Main-16/INFO]: Feature Recycler just prevented 8 crashes!

I double-checked the log from prior to confirm it was this that crashed it, and it was the old growth pine taiga one so yep. I am running many mods, so if you think you need more info to replicate or otherwise investigate let me know - I am working on this modpack actively so I am not uploading every version but I can throw one up and link you if you need it.

[JT122406]

What mod version and do you have terralith?