diff --git a/src/AcDream.Core.Net/Messages/GameEvents.cs b/src/AcDream.Core.Net/Messages/GameEvents.cs
index edb98809..71c7a4f5 100644
--- a/src/AcDream.Core.Net/Messages/GameEvents.cs
+++ b/src/AcDream.Core.Net/Messages/GameEvents.cs
@@ -402,11 +402,17 @@ public static class GameEvents
         return BinaryPrimitives.ReadUInt32LittleEndian(payload);
     }
 
-    /// <summary>0x00A0 InventoryServerSaveFailed: revert a speculative local inventory op.</summary>
-    public static uint? ParseInventoryServerSaveFailed(ReadOnlySpan<byte> payload)
+    /// <summary>0x00A0 InventoryServerSaveFailed: revert a speculative local inventory op.
+    /// (itemGuid, weenieError) — ACE GameEventInventoryServerSaveFailed.cs; holtburger
+    /// events.rs:147 reads both fields.</summary>
+    public readonly record struct InventoryServerSaveFailed(uint ItemGuid, uint WeenieError);
+
+    public static InventoryServerSaveFailed? ParseInventoryServerSaveFailed(ReadOnlySpan<byte> payload)
     {
-        if (payload.Length < 4) return null;
-        return BinaryPrimitives.ReadUInt32LittleEndian(payload);
+        if (payload.Length < 8) return null;
+        return new InventoryServerSaveFailed(
+            BinaryPrimitives.ReadUInt32LittleEndian(payload),
+            BinaryPrimitives.ReadUInt32LittleEndian(payload.Slice(4)));
     }
 
     /// <summary>0x0052 CloseGroundContainer: server closed a ground container view.</summary>
diff --git a/tests/AcDream.Core.Net.Tests/Messages/GameEventsInventoryTests.cs b/tests/AcDream.Core.Net.Tests/Messages/GameEventsInventoryTests.cs
index c77f646b..0517a1ff 100644
--- a/tests/AcDream.Core.Net.Tests/Messages/GameEventsInventoryTests.cs
+++ b/tests/AcDream.Core.Net.Tests/Messages/GameEventsInventoryTests.cs
@@ -59,4 +59,17 @@ public sealed class GameEventsInventoryTests
         Assert.Equal(3u, p.Value.Placement);
         Assert.Equal(1u, p.Value.ContainerType);
     }
+
+    [Fact]
+    public void ParseInventoryServerSaveFailed_readsGuidAndError()
+    {
+        var b = new byte[8];
+        BinaryPrimitives.WriteUInt32LittleEndian(b.AsSpan(0), 0x50000A01u); // itemGuid
+        BinaryPrimitives.WriteUInt32LittleEndian(b.AsSpan(4), 0x0Au);       // weenieError
+
+        var p = GameEvents.ParseInventoryServerSaveFailed(b);
+        Assert.NotNull(p);
+        Assert.Equal(0x50000A01u, p!.Value.ItemGuid);
+        Assert.Equal(0x0Au, p.Value.WeenieError);
+    }
 }