diff --git a/libs/admin-console/src/common/collections/abstractions/collection-vNext.service.ts b/libs/admin-console/src/common/collections/abstractions/collection-vNext.service.ts
index 77de8984dc..e4636a3564 100644
--- a/libs/admin-console/src/common/collections/abstractions/collection-vNext.service.ts
+++ b/libs/admin-console/src/common/collections/abstractions/collection-vNext.service.ts
@@ -9,7 +9,7 @@ import { CollectionData, Collection, CollectionView } from "../models";
 export abstract class CollectionvNextService {
   encryptedCollections$: (userId$: Observable<UserId>) => Observable<Collection[]>;
   decryptedCollections$: (userId$: Observable<UserId>) => Observable<CollectionView[]>;
-  upsert: (collection: CollectionData | CollectionData[]) => Promise<any>;
+  upsert: (collection: CollectionData | CollectionData[], userId: UserId) => Promise<any>;
   replace: (collections: { [id: string]: CollectionData }, userId: UserId) => Promise<any>;
   /**
    * Clear decrypted state without affecting encrypted state.
diff --git a/libs/admin-console/src/common/collections/services/default-collection-vNext.service.spec.ts b/libs/admin-console/src/common/collections/services/default-collection-vNext.service.spec.ts
index 5325b58c07..2505d8cc07 100644
--- a/libs/admin-console/src/common/collections/services/default-collection-vNext.service.spec.ts
+++ b/libs/admin-console/src/common/collections/services/default-collection-vNext.service.spec.ts
@@ -167,14 +167,74 @@ describe("DefaultCollectionService", () => {
 
     it("handles null collection state", async () => {
       await stateProvider.setUserState(ENCRYPTED_COLLECTION_DATA_KEY, null, userId);
-      cryptoKeys.next({});
 
       const decryptedCollections = await firstValueFrom(
-        collectionService.decryptedCollections$(of(userId)),
+        collectionService.encryptedCollections$(of(userId)),
       );
       expect(decryptedCollections.length).toBe(0);
     });
   });
+
+  describe("upsert", () => {
+    it("upserts to existing collections", async () => {
+      const org1 = Utils.newGuid() as OrganizationId;
+      const collection1 = collectionDataFactory(org1);
+
+      const org2 = Utils.newGuid() as OrganizationId;
+      const collection2 = collectionDataFactory(org2);
+
+      await stateProvider.setUserState(
+        ENCRYPTED_COLLECTION_DATA_KEY,
+        {
+          [collection1.id]: collection1,
+          [collection2.id]: collection2,
+        },
+        userId,
+      );
+
+      const updatedCollection1 = Object.assign(new CollectionData({} as any), collection1, {
+        name: makeEncString("UPDATED_ENC_NAME_" + collection1.id).encryptedString,
+      });
+      const newCollection3 = collectionDataFactory(org2);
+
+      await collectionService.upsert([updatedCollection1, newCollection3], userId);
+
+      const result = await firstValueFrom(collectionService.encryptedCollections$(of(userId)));
+      expect(result.length).toBe(3);
+      expect(result).toIncludeAllPartialMembers([
+        {
+          id: collection1.id,
+          name: makeEncString("UPDATED_ENC_NAME_" + collection1.id),
+        },
+        {
+          id: collection2.id,
+          name: makeEncString("ENC_NAME_" + collection2.id),
+        },
+        {
+          id: newCollection3.id,
+          name: makeEncString("ENC_NAME_" + newCollection3.id),
+        },
+      ]);
+    });
+
+    it("upserts to a null state", async () => {
+      const org1 = Utils.newGuid() as OrganizationId;
+      const collection1 = collectionDataFactory(org1);
+
+      await stateProvider.setUserState(ENCRYPTED_COLLECTION_DATA_KEY, null, userId);
+
+      await collectionService.upsert(collection1, userId);
+
+      const result = await firstValueFrom(collectionService.encryptedCollections$(of(userId)));
+      expect(result.length).toBe(1);
+      expect(result).toIncludeAllPartialMembers([
+        {
+          id: collection1.id,
+          name: makeEncString("ENC_NAME_" + collection1.id),
+        },
+      ]);
+    });
+  });
 });
 
 const collectionDataFactory = (orgId: OrganizationId) => {
diff --git a/libs/admin-console/src/common/collections/services/default-collection-vNext.service.ts b/libs/admin-console/src/common/collections/services/default-collection-vNext.service.ts
index cddee799d3..0ec2a386ba 100644
--- a/libs/admin-console/src/common/collections/services/default-collection-vNext.service.ts
+++ b/libs/admin-console/src/common/collections/services/default-collection-vNext.service.ts
@@ -73,11 +73,11 @@ export class DefaultCollectionvNextService implements CollectionvNextService {
     return userId$.pipe(switchMap((userId) => this.decryptedCollectionState(userId).state$));
   }
 
-  async upsert(toUpdate: CollectionData | CollectionData[]): Promise<void> {
+  async upsert(toUpdate: CollectionData | CollectionData[], userId: UserId): Promise<void> {
     if (toUpdate == null) {
       return;
     }
-    await this.activeUserEncryptedCollectionDataState.update((collections) => {
+    await this.encryptedCollectionState(userId).update((collections) => {
       if (collections == null) {
         collections = {};
       }