diff --git a/src/main/java/ru/betterend/registry/EndBiomes.java b/src/main/java/ru/betterend/registry/EndBiomes.java
index 5eb766db..3ece03e7 100644
--- a/src/main/java/ru/betterend/registry/EndBiomes.java
+++ b/src/main/java/ru/betterend/registry/EndBiomes.java
@@ -81,7 +81,7 @@ public class EndBiomes {
 		biomeRegistry.forEach((biome) -> {
 			if (biome.getCategory() == Category.THEEND) {
 				Identifier id = biomeRegistry.getId(biome);
-				if (!ID_MAP.containsKey(id)) {
+				if (!ID_MAP.containsKey(id) && !LAND_BIOMES.containsImmutable(id) && !VOID_BIOMES.containsImmutable(id)) {
 					JsonObject config = configs.get(id.getNamespace());
 					if (config == null) {
 						config = loadJsonConfig(id.getNamespace());
@@ -109,6 +109,9 @@ public class EndBiomes {
 			}
 		});
 		
+		System.out.println("Land");
+		LAND_BIOMES.debug();
+		
 		CLIENT.clear();
 	}
 	
diff --git a/src/main/java/ru/betterend/world/biome/EndBiome.java b/src/main/java/ru/betterend/world/biome/EndBiome.java
index 72bf3ff8..0c5ae710 100644
--- a/src/main/java/ru/betterend/world/biome/EndBiome.java
+++ b/src/main/java/ru/betterend/world/biome/EndBiome.java
@@ -111,6 +111,10 @@ public class EndBiome {
 		genChance += chance;
 		return genChance;
 	}
+	
+	public String debug() {
+		return this.mcID + " " + this.genChanceUnmutable + " " + this.genChance;
+	}
 
 	public Biome getBiome() {
 		return biome;
diff --git a/src/main/java/ru/betterend/world/generator/BiomePicker.java b/src/main/java/ru/betterend/world/generator/BiomePicker.java
index 821956f0..9221335a 100644
--- a/src/main/java/ru/betterend/world/generator/BiomePicker.java
+++ b/src/main/java/ru/betterend/world/generator/BiomePicker.java
@@ -2,22 +2,27 @@ package ru.betterend.world.generator;
 
 import java.util.List;
 import java.util.Random;
+import java.util.Set;
 
 import com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
 
+import net.minecraft.util.Identifier;
 import ru.betterend.registry.EndBiomes;
 import ru.betterend.world.biome.EndBiome;
 
 public class BiomePicker {
+	private final Set<Identifier> immutableIDs = Sets.newHashSet();
 	private final List<EndBiome> biomes = Lists.newArrayList();
 	private float maxChanceUnmutable = 0;
 	private float maxChance = 0;
 	private int biomeCount = 0;
 	
 	public void addBiome(EndBiome biome) {
-		biomes.add(biome);
 		maxChance = biome.mutateGenChance(maxChance);
+		immutableIDs.add(biome.getID());
 		maxChanceUnmutable = maxChance;
+		biomes.add(biome);
 		biomeCount ++;
 	}
 	
@@ -43,4 +48,14 @@ public class BiomePicker {
 	public List<EndBiome> getBiomes() {
 		return biomes;
 	}
+
+	public void debug() {
+		for (EndBiome b: biomes) {
+			System.out.println(b.debug());
+		}
+	}
+	
+	public boolean containsImmutable(Identifier id) {
+		return immutableIDs.contains(id);
+	}
 }