From 4a5ff8e306151f553764848744cd3a8bcc5e16e3 Mon Sep 17 00:00:00 2001
From: dordsor21 <dordsor21@gmail.com>
Date: Fri, 14 Jun 2024 19:18:35 +0100
Subject: [PATCH] fix: wrap immutable map in MinecraftStructure writer  - fixes
 #2781

---
 .../extent/clipboard/io/schematic/MinecraftStructure.java     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/clipboard/io/schematic/MinecraftStructure.java b/worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/clipboard/io/schematic/MinecraftStructure.java
index 0779418df..c1f129112 100644
--- a/worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/clipboard/io/schematic/MinecraftStructure.java
+++ b/worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/clipboard/io/schematic/MinecraftStructure.java
@@ -236,11 +236,11 @@ public class MinecraftStructure implements ClipboardReader, ClipboardWriter {
             BaseEntity state = entity.getState();
             if (state != null) {
                 CompoundTag nbt = state.getNbtData();
-                Map<String, Tag> nbtMap = nbt.getValue();
+                Map<String, Tag> nbtMap = new HashMap<>(nbt.getValue());
                 // Replace rotation data
                 nbtMap.put("Rotation", writeRotation(entity.getLocation()));
                 nbtMap.put("id", new StringTag(state.getType().id()));
-                Map<String, Object> entityMap = FaweCache.INSTANCE.asMap("pos", pos, "blockPos", blockPos, "nbt", nbt);
+                Map<String, Object> entityMap = FaweCache.INSTANCE.asMap("pos", pos, "blockPos", blockPos, "nbt", new CompoundTag(nbtMap));
                 entities.add(entityMap);
             }
         }