diff --git a/src/application/db/index.ts b/src/application/db/index.ts
index 32a62089..27e45c73 100644
--- a/src/application/db/index.ts
+++ b/src/application/db/index.ts
@@ -11,7 +11,7 @@ import {
   workspaceMemberProfileSchema,
   WorkspaceMemberProfileTable,
 } from '@/application/db/tables/workspace_member_profiles';
-import { VersionedDoc, YDoc } from '@/application/types';
+import { YDoc } from '@/application/types';
 import { Log } from '@/utils/log';
 
 type DexieTables = ViewMetasTable & UserTable & rowTable & WorkspaceMemberProfileTable & VersionsTable;
@@ -130,10 +130,10 @@ export interface OpenCollabOptions {
 /**
  * Open the collaboration database, and return a function to close it
  */
-export async function openCollabDB(name: string, options: OpenCollabOptions = {}): Promise<VersionedDoc> {
+export async function openCollabDB(name: string, options: OpenCollabOptions = {}): Promise<YDoc> {
   const doc = new Y.Doc({
     guid: name,
-  });
+  }) as YDoc;
 
   await ensureYjsStores(name);
 
@@ -148,6 +148,7 @@ export async function openCollabDB(name: string, options: OpenCollabOptions = {}
   }
 
   version = options.expectedVersion;
+  doc.version = version;
 
   provider.on('synced', () => {
     if (!openedSet.has(name)) {
@@ -157,7 +158,7 @@ export async function openCollabDB(name: string, options: OpenCollabOptions = {}
 
   await provider.whenSynced;
 
-  return { doc, version };
+  return doc;
 }
 
 export async function openCollabDBWithProvider(
diff --git a/src/application/services/js-services/cache/index.ts b/src/application/services/js-services/cache/index.ts
index 225d1292..7b2c2337 100644
--- a/src/application/services/js-services/cache/index.ts
+++ b/src/application/services/js-services/cache/index.ts
@@ -194,7 +194,7 @@ export async function getPublishView<
 ) {
   const name = `${namespace}_${publishName}`;
 
-  const { doc } = await openCollabDB(name);
+  const doc = await openCollabDB(name);
 
   const exist = (await hasViewMetaCache(name)) && hasCollabCache(doc);
   let didRevalidate = false;
@@ -251,7 +251,7 @@ export async function getPageDoc<
     rows?: Record<RowId, number[]>;
   }
 >(fetcher: Fetcher<T>, name: string, strategy: StrategyType = StrategyType.CACHE_AND_NETWORK) {
-  const { doc, version } = await openCollabDB(name);
+  const doc = await openCollabDB(name);
 
   const exist = hasCollabCache(doc);
   let didRevalidate = false;
@@ -295,7 +295,7 @@ export async function getPageDoc<
     });
   }
 
-  return { doc, version };
+  return doc;
 }
 
 async function updateRows(collab: YDoc, rows: Record<RowId, number[]>) {
@@ -399,7 +399,7 @@ export async function revalidatePublishView<
 
   if (subDocuments) {
     for (const [key, value] of Object.entries(subDocuments)) {
-      const { doc } = await openCollabDB(key);
+      const doc = await openCollabDB(key);
 
       applyYDoc(doc, new Uint8Array(value));
     }
diff --git a/src/application/services/js-services/http/http_api.ts b/src/application/services/js-services/http/http_api.ts
index e2589687..74ba2aff 100644
--- a/src/application/services/js-services/http/http_api.ts
+++ b/src/application/services/js-services/http/http_api.ts
@@ -897,7 +897,7 @@ export async function databaseBlobDiff(
   return database_blob.DatabaseBlobDiffResponse.decode(bytes);
 }
 
-export async function getCollabVersions(workspaceId: string, objectId: string, since: Date | undefined) {
+export async function getCollabVersions(workspaceId: string, objectId: string, since?: Date) {
   const url = `/api/workspace/${workspaceId}/collab/${objectId}/history`;
   const from = since?.getTime() || null;
   const response = await axiosInstance?.get<{
@@ -908,7 +908,8 @@ export async function getCollabVersions(workspaceId: string, objectId: string, s
       name: string | null,
       created_at: string,
       created_by: number | null,
-      is_deleted: boolean
+      is_deleted: boolean,
+      editors: number[],
     }[];
     message: string;
   }>(url, {
@@ -927,7 +928,8 @@ export async function getCollabVersions(workspaceId: string, objectId: string, s
       parentId: data.parent,
       name: data.name,
       createdAt: new Date(data.created_at),
-      isDeleted: data.is_deleted
+      isDeleted: data.is_deleted,
+      editors: data.editors,
     };
   });
 }
diff --git a/src/application/services/js-services/index.ts b/src/application/services/js-services/index.ts
index 9a825c53..ba9e07e7 100644
--- a/src/application/services/js-services/index.ts
+++ b/src/application/services/js-services/index.ts
@@ -60,7 +60,8 @@ import {
   UploadPublishNamespacePayload,
   ViewIconType,
   WorkspaceMember,
-  YjsEditorKey
+  YDoc,
+  YjsEditorKey,
 } from '@/application/types';
 import { applyYDoc } from '@/application/ydoc/apply';
 import { RepeatedChatMessage } from '@/components/chat';
@@ -86,6 +87,14 @@ export class AFClientService implements AFService {
     APIService.initAPIService(config.cloudConfig);
   }
 
+  async createRowDoc(rowKey: string): Promise<YDoc> {
+    throw new Error('Not implemented');
+  }
+
+  deleteRowDoc(rowKey: string){
+    throw new Error('Not implemented');
+  }
+
   getAxiosInstance() {
     return APIService.getAxiosInstance();
   }
@@ -193,7 +202,7 @@ export class AFClientService implements AFService {
   }
 
   async getPublishRowDocument(viewId: string) {
-    const { doc } = await openCollabDB(viewId);
+    const doc = await openCollabDB(viewId);
 
     if (hasCollabCache(doc)) {
       return doc;
@@ -536,7 +545,7 @@ export class AFClientService implements AFService {
 
     const isLoaded = this.viewLoaded.has(name);
 
-    const { doc, version } = await getPageDoc(
+    const doc = await getPageDoc(
       async () => {
         try {
           return await fetchPageCollab(workspaceId, viewId);
@@ -561,7 +570,7 @@ export class AFClientService implements AFService {
       this.viewLoaded.add(name);
     }
 
-    return { doc, version };
+    return doc;
   }
 
   async getInvitation(invitationId: string) {
@@ -625,10 +634,7 @@ export class AFClientService implements AFService {
     return APIService.uploadDatabaseCsvImportFile(presignedUrl, file, onProgress);
   }
 
-  async getDatabaseCsvImportStatus(
-    workspaceId: string,
-    taskId: string
-  ): Promise<DatabaseCsvImportStatusResponse> {
+  async getDatabaseCsvImportStatus(workspaceId: string, taskId: string): Promise<DatabaseCsvImportStatusResponse> {
     return APIService.getDatabaseCsvImportStatus(workspaceId, taskId);
   }
 
@@ -648,7 +654,11 @@ export class AFClientService implements AFService {
     return APIService.addAppPage(workspaceId, parentViewId, payload);
   }
 
-  async createDatabaseView(workspaceId: string, viewId: string, payload: CreateDatabaseViewPayload): Promise<CreateDatabaseViewResponse> {
+  async createDatabaseView(
+    workspaceId: string,
+    viewId: string,
+    payload: CreateDatabaseViewPayload
+  ): Promise<CreateDatabaseViewResponse> {
     return APIService.createDatabaseView(workspaceId, viewId, payload);
   }
 
@@ -774,16 +784,20 @@ export class AFClientService implements AFService {
     return APIService.getMentionableUsers(workspaceId);
   }
 
-  async updatePageMention(workspaceId: string, viewId: string, data: {
-    person_id: string;
-    block_id?: string | null;
-    row_id?: string | null;
-    require_notification: boolean;
-    view_name: string;
-    ancestors?: string[] | null;
-    view_layout?: number | null;
-    is_row_document?: boolean;
-  }) {
+  async updatePageMention(
+    workspaceId: string,
+    viewId: string,
+    data: {
+      person_id: string;
+      block_id?: string | null;
+      row_id?: string | null;
+      require_notification: boolean;
+      view_name: string;
+      ancestors?: string[] | null;
+      view_layout?: number | null;
+      is_row_document?: boolean;
+    }
+  ) {
     return APIService.updatePageMention(workspaceId, viewId, data);
   }
 
diff --git a/src/application/services/services.type.ts b/src/application/services/services.type.ts
index 19eac8ed..7e6e2ea9 100644
--- a/src/application/services/services.type.ts
+++ b/src/application/services/services.type.ts
@@ -51,7 +51,6 @@ import {
   UploadPublishNamespacePayload,
   User,
   UserWorkspaceInfo,
-  VersionedDoc,
   View,
   ViewIconType,
   Workspace,
@@ -123,7 +122,7 @@ export interface WorkspaceService {
 }
 
 export interface AppService {
-  getPageDoc: (workspaceId: string, viewId: string, errorCallback?: (error: { code: number }) => void) => Promise<VersionedDoc>;
+  getPageDoc: (workspaceId: string, viewId: string, errorCallback?: (error: { code: number }) => void) => Promise<YDoc>;
   createRowDoc: (rowKey: string) => Promise<YDoc>;
   deleteRowDoc: (rowKey: string) => void;
   getAppDatabaseViewRelations: (workspaceId: string, databaseStorageId: string) => Promise<DatabaseRelations>;
diff --git a/src/application/types.ts b/src/application/types.ts
index f28aaf74..6f4ae05f 100644
--- a/src/application/types.ts
+++ b/src/application/types.ts
@@ -428,6 +428,11 @@ export interface YDoc extends Y.Doc {
    */
   object_id?: string;
 
+  /**
+   * Collab version for this document.
+   */
+  version?: string;
+
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
   getMap(key: YjsEditorKey.data_section): YSharedRoot | any;
 }
@@ -1069,11 +1074,6 @@ export interface View {
   access_level?: AccessLevel;
 }
 
-export interface VersionedDoc {
-  doc: Y.Doc;
-  version: string | null;
-}
-
 export interface UpdatePublishConfigPayload {
   comments_enabled?: boolean;
   duplicate_enabled?: boolean;
diff --git a/src/components/app/hooks/useViewOperations.ts b/src/components/app/hooks/useViewOperations.ts
index aaaf7f5c..0358e56b 100644
--- a/src/components/app/hooks/useViewOperations.ts
+++ b/src/components/app/hooks/useViewOperations.ts
@@ -57,10 +57,10 @@ export function useViewOperations() {
   // Register workspace database document for sync
   const registerWorkspaceDatabaseDoc = useCallback(
     async (workspaceId: string, databaseStorageId: string) => {
-      const { doc, version } = await openCollabDB(databaseStorageId);
+      const doc = await openCollabDB(databaseStorageId);
 
       doc.guid = databaseStorageId;
-      const { doc: workspaceDatabaseDoc } = registerSyncContext({ doc, collabType: Types.WorkspaceDatabase, version });
+      const { doc: workspaceDatabaseDoc } = registerSyncContext({ doc, collabType: Types.WorkspaceDatabase });
 
       workspaceDatabaseDocMapRef.current.clear();
       workspaceDatabaseDocMapRef.current.set(workspaceId, workspaceDatabaseDoc);
@@ -393,7 +393,7 @@ export function useViewOperations() {
         hasAwareness: !!awareness,
       });
 
-      const syncContext = registerSyncContext({ doc, collabType, awareness, version });
+      const syncContext = registerSyncContext({ doc, collabType, awareness });
 
       docWithMeta._syncBound = true;
 
@@ -436,8 +436,7 @@ export function useViewOperations() {
         });
         const syncContext = registerSyncContext({
           doc,
-          collabType: Types.DatabaseRow,
-          version: null, // atm. versions are not used for database rows
+          collabType: Types.DatabaseRow
         });
 
         createdRowKeys.current.push(rowKey);
diff --git a/src/components/ws/useSync.ts b/src/components/ws/useSync.ts
index 5604d853..1d7e474c 100644
--- a/src/components/ws/useSync.ts
+++ b/src/components/ws/useSync.ts
@@ -11,7 +11,7 @@ import { openCollabDB } from '@/application/db';
 import * as http from '@/application/services/js-services/http/http_api';
 import { collabFullSyncBatch } from '@/application/services/js-services/http/http_api';
 import { handleMessage, initSync, SyncContext } from '@/application/services/js-services/sync-protocol';
-import { Types, User } from '@/application/types';
+import { Types, User, YDoc } from '@/application/types';
 import { useCurrentUser } from '@/components/main/app.hooks';
 import { AppflowyWebSocketType } from '@/components/ws/useAppflowyWebSocket';
 import { BroadcastChannelType } from '@/components/ws/useBroadcastChannel';
@@ -25,10 +25,9 @@ export interface RegisterSyncContext {
    * The Y.Doc instance to be used for collaboration.
    * It must have a valid guid (UUID v4).
    */
-  doc: Y.Doc;
+  doc: YDoc;
   awareness?: awarenessProtocol.Awareness;
   collabType: Types;
-  version: string | null;
   emit?: (reply: messages.IMessage) => void;
 }
 
@@ -396,14 +395,13 @@ export const useSync = (ws: AppflowyWebSocketType, bc: BroadcastChannelType, eve
 
           // remove stale persisted data for older version and reinitialize it
           await deleteDB(context.doc.guid);
-          const { doc } = await openCollabDB(context.doc.guid, { expectedVersion: newVersion, currentUser: user?.uid });
+          const doc = await openCollabDB(context.doc.guid, { expectedVersion: newVersion, currentUser: user?.uid });
           const awareness = new awarenessProtocol.Awareness(doc);
 
           context = registerSyncContext({
             doc: awareness.doc,
             awareness,
-            collabType: context.collabType,
-            version: newVersion || null,
+            collabType: context.collabType
           });
         }
 
@@ -459,16 +457,15 @@ export const useSync = (ws: AppflowyWebSocketType, bc: BroadcastChannelType, eve
       context.doc.emit('reset', [context, version])
       context.doc.destroy();
 
-      const { doc } = await openCollabDB(context.doc.guid, { expectedVersion: version, currentUser: currentUser.uid });
+      const doc = await openCollabDB(context.doc.guid, { expectedVersion: version, currentUser: currentUser.uid });
 
       Y.applyUpdate(doc, docState);
       const awareness = new awarenessProtocol.Awareness(doc);
 
       registerSyncContext({
-        doc: awareness.doc,
+        doc,
         awareness,
-        collabType: context.collabType,
-        version,
+        collabType: context.collabType
       });
     }
   }, [registeredContexts, currentUser, registerSyncContext]);