diff --git a/amnet-native/models/AMCard.ts b/amnet-native/models/AMCard.ts
index 51e7bcf..5dd64d3 100644
--- a/amnet-native/models/AMCard.ts
+++ b/amnet-native/models/AMCard.ts
@@ -51,7 +51,7 @@ export class AMCard extends Realm.Object<AMCard> implements AMCardData {
             name: {type: "string", default: "New Card", indexed: true},
             added: {type: "date", default: new Date(), indexed: true},
             lastUsed: {type: "date", optional: true, indexed: true},
-            usageHistory: {type: "linkingObjects", objectType: "cardUsageHistory", property: "_id"},
+            usageHistory: {type: "linkingObjects", objectType: "cardUsageHistory", property: "card"},
             physicalCardData: {type: "object", objectType: "physicalCard", optional: true}
         }
     };
diff --git a/amnet-native/models/AMCardRecentUse.ts b/amnet-native/models/AMCardRecentUse.ts
index 9b21aa0..0765761 100644
--- a/amnet-native/models/AMCardRecentUse.ts
+++ b/amnet-native/models/AMCardRecentUse.ts
@@ -30,7 +30,7 @@ export class AMCardRecentUse extends Realm.Object<AMCardRecentUse> {
 
         properties: {
             gameId: "string",
-            card: {type: "object", objectType: "card", optional: false}
+            card: {type: "object", objectType: "card"}
         }
     }