Fix incorrect old oversized chunk data merging

All legacy oversized chunks were created before the new
chunk format, so don't try to merge into the new format.

patches/server/0330-Allow-Saving-of-Oversized-Chunks.patch

@@ -142,7 +142,7 @@ index 04e45b4de2f4e26853a4fed6271cf79ef8607154..44de464b5f2190944c7a7316a76e13f9
  
          private final ChunkPos pos;
 diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
-index 40830a2b231df9bbf676d8325e76c8252a6c1d6c..2cbc17288b1dc52edb2bdad29976d0f551b1e176 100644
+index 40830a2b231df9bbf676d8325e76c8252a6c1d6c..a1bfcdd713c47d8613eb4af7625a64d51161690b 100644
 --- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
 +++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
 @@ -11,8 +11,10 @@ import java.nio.file.Files;
@@ -191,8 +191,8 @@ index 40830a2b231df9bbf676d8325e76c8252a6c1d6c..2cbc17288b1dc52edb2bdad29976d0f5
 +                }
 +                CompoundTag oversizedLevel = oversizedData.getCompound("Level");
 +
-+                mergeChunkList(chunk, oversizedLevel, "entities", "Entities");
-+                mergeChunkList(chunk, oversizedLevel, "block_entities", "TileEntities");
++                mergeChunkList(chunk.getCompound("Level"), oversizedLevel, "Entities", "Entities");
++                mergeChunkList(chunk.getCompound("Level"), oversizedLevel, "TileEntities", "TileEntities");
 +
 +                return chunk;
 +            } catch (Throwable throwable) {