diff --git a/Assets/Scripts/Gameplay/ActionGameManager.cs b/Assets/Scripts/Gameplay/ActionGameManager.cs
index 3573dfba3..491fb93c5 100644
--- a/Assets/Scripts/Gameplay/ActionGameManager.cs
+++ b/Assets/Scripts/Gameplay/ActionGameManager.cs
@@ -225,11 +225,6 @@ public class ActionGameManager : MonoBehaviour
 
     private List<Story> _stories = new List<Story>();
 
-    public EntitySettings NewEntitySettings
-    {
-        get => MessagePackSerializer.Deserialize<EntitySettings>(MessagePackSerializer.Serialize(Settings.GameplaySettings.DefaultEntitySettings));
-    }
-
     private void OnApplicationQuit()
     {
         SaveRun();
diff --git a/Assets/Scripts/ServerShared/Entity.cs b/Assets/Scripts/ServerShared/Entity.cs
index 5870c11a5..0383c96e1 100644
--- a/Assets/Scripts/ServerShared/Entity.cs
+++ b/Assets/Scripts/ServerShared/Entity.cs
@@ -6,6 +6,7 @@ using GameCult.Caching;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using MessagePack;
 using UniRx;
 using CultMath;
 using static CultMath.math;
@@ -337,7 +338,7 @@ public abstract class Entity
 
     public Entity(ItemManager itemManager, Zone zone, EquippableItem hull, EntitySettings settings)
     {
-        Settings = settings;
+        Settings = MessagePackSerializer.Deserialize<EntitySettings>(MessagePackSerializer.Serialize(settings));
         ItemManager = itemManager;
         Zone = zone;
         Hull = hull;
diff --git a/Assets/Scripts/ServerShared/EntitySerializer.cs b/Assets/Scripts/ServerShared/EntitySerializer.cs
index fc375dd8d..4b727eee4 100644
--- a/Assets/Scripts/ServerShared/EntitySerializer.cs
+++ b/Assets/Scripts/ServerShared/EntitySerializer.cs
@@ -48,8 +48,6 @@ public static class EntitySerializer
 
     public static Entity Unpack(ItemManager itemManager, Zone zone, EntityPack pack)
     {
-        pack.Settings ??= MessagePackSerializer.Deserialize<EntitySettings>(
-            MessagePackSerializer.Serialize(itemManager.GameplaySettings.DefaultEntitySettings));
         return pack switch
         {
             ShipPack shipPack => Unpack(itemManager, zone, shipPack),
diff --git a/Assets/Scripts/UI/Menu/TradeMenu.cs b/Assets/Scripts/UI/Menu/TradeMenu.cs
index 1642dc24c..9bc285b75 100644
--- a/Assets/Scripts/UI/Menu/TradeMenu.cs
+++ b/Assets/Scripts/UI/Menu/TradeMenu.cs
@@ -374,7 +374,7 @@ public class TradeMenu : MonoBehaviour
             {
                 if (hullData.HullType != HullType.Ship) throw new ArgumentException("Attempted to buy non-ship hull from station, WTF are you doing?!");
 
-                var ship = new Ship(GameManager.ItemManager, GameManager.Zone, item as EquippableItem, GameManager.NewEntitySettings) { IsPlayerShip = true };
+                var ship = new Ship(GameManager.ItemManager, GameManager.Zone, item as EquippableItem, GameManager.ItemManager.GameplaySettings.DefaultEntitySettings) { IsPlayerShip = true };
                 ship.SetParent(GameManager.DockedEntity);
 
                 GameManager.Credits -= data.Price;
diff --git a/tests/Aetheria.Shared.Tests/LoadoutTests.cs b/tests/Aetheria.Shared.Tests/LoadoutTests.cs
index 911434dcf..6403120a5 100644
--- a/tests/Aetheria.Shared.Tests/LoadoutTests.cs
+++ b/tests/Aetheria.Shared.Tests/LoadoutTests.cs
@@ -715,6 +715,33 @@ public sealed class LoadoutTests : IDisposable
         }
     }
 
+    // Cut 0 (settings-globals-cut.md): Entity's ctor must copy the template it is given. No entity may alias
+    // GameplaySettings.DefaultEntitySettings, or a write through one ship (InventoryMenu's Shutdown Threshold
+    // edit) would silently move the default for every other ship, and once settings are a catalog global, the
+    // cached record itself.
+    [Fact]
+    public void EntitiesDoNotShareDefaultEntitySettings()
+    {
+        using var cache = Open();
+        var items = new ItemManager(cache, new ProvenanceLedger(), RunSaveTests.TestSettings(), _ => { });
+        var maker = cache.RefOf(cache.GetByName<Faction>("Maker"));
+        var hullData = cache.GetByName<HullData>("Skiff");
+        var template = items.GameplaySettings.DefaultEntitySettings;
+        var originalThreshold = template.ShutdownPerformance;
+
+        Ship BuildShip() => new Ship(items, null, (EquippableItem) items.CreateInstance(items.CreateLot(hullData, maker, .5f)), template);
+
+        var shipA = BuildShip();
+        var shipB = BuildShip();
+
+        shipA.Settings.ShutdownPerformance = originalThreshold + 1;
+
+        Assert.NotSame(template, shipA.Settings);
+        Assert.NotSame(shipA.Settings, shipB.Settings);
+        Assert.Equal(originalThreshold, shipB.Settings.ShutdownPerformance);
+        Assert.Equal(originalThreshold, template.ShutdownPerformance);
+    }
+
     // Everything available: for tests about placement and failure lists.
     private static Ship Build(ItemManager items, Loadout loadout, List<string> failures) =>
         Loadouts.Materialize(items, null, loadout, _ => true, failures);