diff --git a/src/controllers/api/artifactTransmutationController.ts b/src/controllers/api/artifactTransmutationController.ts
index 4310c7c4..deb05cde 100644
--- a/src/controllers/api/artifactTransmutationController.ts
+++ b/src/controllers/api/artifactTransmutationController.ts
@@ -1,9 +1,9 @@
-import { toOid } from "@/src/helpers/inventoryHelpers";
+import { fromOid, toOid } from "@/src/helpers/inventoryHelpers";
 import { createVeiledRivenFingerprint, rivenRawToRealWeighted } from "@/src/helpers/rivenHelper";
 import { addMiscItems, addMods, getInventory } from "@/src/services/inventoryService";
 import { getAccountIdForRequest } from "@/src/services/loginService";
 import { getRandomElement, getRandomWeightedReward, getRandomWeightedRewardUc } from "@/src/services/rngService";
-import { IOid } from "@/src/types/commonTypes";
+import { IUpgradeFromClient } from "@/src/types/inventoryTypes/inventoryTypes";
 import { RequestHandler } from "express";
 import { ExportBoosterPacks, ExportUpgrades, TRarity } from "warframe-public-export-plus";
 
@@ -24,7 +24,7 @@ export const artifactTransmutationController: RequestHandler = async (req, res)
         ]);
 
         payload.Consumed.forEach(upgrade => {
-            inventory.Upgrades.pull({ _id: upgrade.ItemId.$oid });
+            inventory.Upgrades.pull({ _id: fromOid(upgrade.ItemId) });
         });
 
         const rawRivenType = getRandomRawRivenType();
@@ -57,8 +57,8 @@ export const artifactTransmutationController: RequestHandler = async (req, res)
         payload.Consumed.forEach(upgrade => {
             const meta = ExportUpgrades[upgrade.ItemType];
             counts[meta.rarity] += upgrade.ItemCount;
-            if (upgrade.ItemId.$oid != "000000000000000000000000") {
-                inventory.Upgrades.pull({ _id: upgrade.ItemId.$oid });
+            if (fromOid(upgrade.ItemId) != "000000000000000000000000") {
+                inventory.Upgrades.pull({ _id: fromOid(upgrade.ItemId) });
             } else {
                 addMods(inventory, [
                     {
@@ -128,24 +128,14 @@ const getRandomRawRivenType = (): string => {
 };
 
 interface IArtifactTransmutationRequest {
-    Upgrade: IAgnosticUpgradeClient;
+    Upgrade: IUpgradeFromClient;
     LevelDiff: number;
-    Consumed: IAgnosticUpgradeClient[];
+    Consumed: IUpgradeFromClient[];
     Cost: number;
     FusionPointCost: number;
     RivenTransmute?: boolean;
 }
 
-interface IAgnosticUpgradeClient {
-    ItemType: string;
-    ItemId: IOid;
-    FromSKU: boolean;
-    UpgradeFingerprint: string;
-    PendingRerollFingerprint: string;
-    ItemCount: number;
-    LastAdded: IOid;
-}
-
 const specialModSets: string[][] = [
     [
         "/Lotus/Upgrades/Mods/Immortal/ImmortalOneMod",
diff --git a/src/services/missionInventoryUpdateService.ts b/src/services/missionInventoryUpdateService.ts
index a2d76ae1..14d700ff 100644
--- a/src/services/missionInventoryUpdateService.ts
+++ b/src/services/missionInventoryUpdateService.ts
@@ -400,8 +400,14 @@ export const addMissionInventoryUpdates = async (
                 break;
             case "Upgrades":
                 value.forEach(clientUpgrade => {
-                    const upgrade = inventory.Upgrades.id(fromOid(clientUpgrade.ItemId))!;
-                    upgrade.UpgradeFingerprint = clientUpgrade.UpgradeFingerprint; // primitive way to copy over the riven challenge progress
+                    const id = fromOid(clientUpgrade.ItemId);
+                    if (id == "") {
+                        // U19 does not provide RawUpgrades and instead interleaves them with riven progress here
+                        addMods(inventory, [clientUpgrade]);
+                    } else {
+                        const upgrade = inventory.Upgrades.id(id)!;
+                        upgrade.UpgradeFingerprint = clientUpgrade.UpgradeFingerprint; // primitive way to copy over the riven challenge progress
+                    }
                 });
                 break;
             case "WeaponSkins":
diff --git a/src/types/inventoryTypes/inventoryTypes.ts b/src/types/inventoryTypes/inventoryTypes.ts
index 3ca59ffd..b18696cc 100644
--- a/src/types/inventoryTypes/inventoryTypes.ts
+++ b/src/types/inventoryTypes/inventoryTypes.ts
@@ -535,6 +535,16 @@ export interface IUpgradeDatabase extends Omit<IUpgradeClient, "ItemId"> {
     _id: Types.ObjectId;
 }
 
+export interface IUpgradeFromClient {
+    ItemType: string;
+    ItemId: IOidWithLegacySupport;
+    FromSKU?: boolean;
+    UpgradeFingerprint: string;
+    PendingRerollFingerprint: string;
+    ItemCount: number;
+    LastAdded: IOidWithLegacySupport;
+}
+
 export interface ICrewShipMembersClient {
     SLOT_A?: ICrewShipMemberClient;
     SLOT_B?: ICrewShipMemberClient;
@@ -1053,7 +1063,7 @@ export interface IQuestStage {
 export interface IRawUpgrade {
     ItemType: string;
     ItemCount: number;
-    LastAdded?: IOid;
+    LastAdded?: IOidWithLegacySupport;
 }
 
 export interface ISeasonChallenge {
diff --git a/src/types/requestTypes.ts b/src/types/requestTypes.ts
index e47b5b86..ab895bd1 100644
--- a/src/types/requestTypes.ts
+++ b/src/types/requestTypes.ts
@@ -15,7 +15,7 @@ import {
     IPlayerSkills,
     IQuestKeyDatabase,
     ILoreFragmentScan,
-    IUpgradeClient,
+    IUpgradeFromClient,
     ICollectibleEntry,
     IDiscoveredMarker,
     ILockedWeaponGroupClient,
@@ -111,7 +111,7 @@ export type IMissionInventoryUpdateRequest = {
         Standing: number;
     }[];
     CollectibleScans?: ICollectibleEntry[];
-    Upgrades?: IUpgradeClient[]; // riven challenge progress
+    Upgrades?: IUpgradeFromClient[]; // riven challenge progress
     WeaponSkins?: IWeaponSkinClient[];
     StrippedItems?: {
         DropTable: string;