diff --git a/SVSim.EmulatedEntrypoint/Controllers/PackController.cs b/SVSim.EmulatedEntrypoint/Controllers/PackController.cs
index 0a7da0a..ae5353b 100644
--- a/SVSim.EmulatedEntrypoint/Controllers/PackController.cs
+++ b/SVSim.EmulatedEntrypoint/Controllers/PackController.cs
@@ -239,9 +239,12 @@ public class PackController : SVSimController
 
         // Open inventory tx with extra includes for GachaPointBalances + GachaPointReceived
         // (needed by TryExchangeAsync to validate balance and already-received guard).
-        await using var tx = await _inv.BeginAsync(viewerId, configure: cfg => cfg
-            .WithInclude(v => v.GachaPointBalances)
-            .WithInclude(v => v.GachaPointReceived));
+        await using var tx = await _inv.BeginAsync(viewerId, configure: cfg =>
+        {
+            cfg.Source = GrantSource.GachaPointExchange;
+            cfg.WithInclude(v => v.GachaPointBalances);
+            cfg.WithInclude(v => v.GachaPointReceived);
+        });
 
         // Use odds_gacha_id (the seasonal pack id) — that's where the balance / received marker
         // live. Mirrors the GetGachaPointRewards fix.