diff --git a/src/models/inventoryModels/inventoryModel.ts b/src/models/inventoryModels/inventoryModel.ts
index 1b990228..47c8da96 100644
--- a/src/models/inventoryModels/inventoryModel.ts
+++ b/src/models/inventoryModels/inventoryModel.ts
@@ -1414,7 +1414,7 @@ const inventorySchema = new Schema<IInventoryDatabase, InventoryDocumentProps>(
 
         //https://warframe.fandom.com/wiki/Heist
         //ProfitTaker(1-4) Example:"LocationTag": "EudicoHeists", "Jobs":Mission name
-        CompletedJobChains: [completedJobChainsSchema],
+        CompletedJobChains: { type: [completedJobChainsSchema], default: undefined },
         //Night Wave Challenge
         SeasonChallengeHistory: [seasonChallengeHistorySchema],
 
diff --git a/src/services/missionInventoryUpdateService.ts b/src/services/missionInventoryUpdateService.ts
index dcef5646..e0641adf 100644
--- a/src/services/missionInventoryUpdateService.ts
+++ b/src/services/missionInventoryUpdateService.ts
@@ -152,6 +152,7 @@ export const addMissionInventoryUpdates = async (
             // eslint-disable-next-line @typescript-eslint/no-unused-vars
             const [bounty, tier, hub, id, tag] = inventoryUpdates.RewardInfo.jobId.split("_");
             if (tag == "EudicoHeists") {
+                inventory.CompletedJobChains ??= [];
                 let chain = inventory.CompletedJobChains.find(x => x.LocationTag == tag);
                 if (!chain) {
                     chain =
diff --git a/src/types/inventoryTypes/inventoryTypes.ts b/src/types/inventoryTypes/inventoryTypes.ts
index c25b7123..244e71bd 100644
--- a/src/types/inventoryTypes/inventoryTypes.ts
+++ b/src/types/inventoryTypes/inventoryTypes.ts
@@ -292,7 +292,7 @@ export interface IInventoryClient extends IDailyAffiliations, InventoryClientEqu
     RecentVendorPurchases?: IRecentVendorPurchaseClient[];
     NodeIntrosCompleted: string[];
     GuildId?: IOid;
-    CompletedJobChains: ICompletedJobChain[];
+    CompletedJobChains?: ICompletedJobChain[];
     SeasonChallengeHistory: ISeasonChallenge[];
     EquippedInstrument?: string;
     InvasionChainProgress: IInvasionChainProgress[];