Copy NBT in upgrade data neighbor ticks

patches/server/Rewrite-dataconverter-system.patch

@@ -17052,7 +17052,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +                        if (outOfBounds == null) {
 +                            outOfBounds = Types.NBT.createEmptyList();
 +                        }
-+                        outOfBounds.addMap(tick);
++                        outOfBounds.addMap(tick.copy());
 +                    }
 +                }
 +