diff --git a/PATCHED.md b/PATCHED.md
index 683f52ca..85e83bb3 100644
--- a/PATCHED.md
+++ b/PATCHED.md
@@ -86,6 +86,7 @@
 | Basic    | [MC-227337](https://bugs.mojang.com/browse/MC-227337) | When a shulker bullet hits an entity, the explodes sound is not played and particles are not produced                                          |
 | Basic    | [MC-231743](https://bugs.mojang.com/browse/MC-231743) | minecraft.used:minecraft.POTTABLE_PLANT doesn't increase when placing plants into flower pots                                                  |
 | Basic    | [MC-232869](https://bugs.mojang.com/browse/MC-232869) | Adult striders can spawn with saddles in peaceful mode                                                                                         |
+| Basic    | [MC-271899](https://bugs.mojang.com/browse/MC-271899) | StructureTemplate Palette's caches are not thread safe                                                                                         |
 | Basic    | [MC-245394](https://bugs.mojang.com/browse/MC-245394) | The sounds of raid horns blaring aren't controlled by the correct sound slider                                                                 |
 | Basic    | [MC-268617](https://bugs.mojang.com/browse/MC-268617) | Structures can't be saved if the game directory is named in a certain way                                                                      |
 
diff --git a/src/main/java/dev/isxander/debugify/mixins/basic/mc271899/StructureTemplateMixin.java b/src/main/java/dev/isxander/debugify/mixins/basic/mc271899/StructureTemplateMixin.java
new file mode 100644
index 00000000..365ae429
--- /dev/null
+++ b/src/main/java/dev/isxander/debugify/mixins/basic/mc271899/StructureTemplateMixin.java
@@ -0,0 +1,23 @@
+package dev.isxander.debugify.mixins.basic.mc271899;
+
+import com.google.common.collect.Maps;
+import dev.isxander.debugify.fixes.BugFix;
+import dev.isxander.debugify.fixes.FixCategory;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.levelgen.structure.templatesystem.StructureTemplate;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Mutable;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.List;
+import java.util.Map;
+
+@BugFix(id = "MC-271899", category = FixCategory.BASIC, env = BugFix.Env.SERVER, description = "StructureTemplate Palette's caches are not thread safe")
+@Mixin(StructureTemplate.Palette.class)
+public class StructureTemplateMixin {
+    @Mutable
+    @Shadow
+    @Final
+    private Map<Block, List<StructureTemplate.StructureBlockInfo>> cache = Maps.newConcurrentMap();
+}
diff --git a/src/main/resources/debugify.mixins.json b/src/main/resources/debugify.mixins.json
index 3ad5ae4f..ee7bf700 100644
--- a/src/main/resources/debugify.mixins.json
+++ b/src/main/resources/debugify.mixins.json
@@ -39,6 +39,7 @@
     "basic.mc227337.ShulkerBulletMixin",
     "basic.mc231743.FlowerPotBlockMixin",
     "basic.mc232869.StriderMixin",
+    "basic.mc271899.StructureTemplateMixin",
     "basic.mc245394.RaidMixin",
     "basic.mc268617.FileUtilMixin",
     "basic.mc30391.LivingEntityMixin",