diff --git a/src/domain/bookmark.ts b/src/domain/bookmark.ts
index 767d4b9..f7366ec 100644
--- a/src/domain/bookmark.ts
+++ b/src/domain/bookmark.ts
@@ -828,13 +828,16 @@ export class BookmarkService {
   public async getPartialBookmarkChangesLog(ctx: ContextManager, userId: number, time: number) {
     const res = (await this.bookmarkRepo.getPartialBookmarkChanges(userId, time)) || []
 
-    const logs = res.map(item => ({
-      target_url: item.target_url,
-      bookmark_id: ctx.hashIds.encodeId(item.bookmark_id),
-      action: item.action
-    }))
-
-    const previous_sync = res.length > 0 ? res[0].created_at.getTime() : null
+    const previous_sync = res.length > 0 ? res[res.length - 1].created_at.getTime() : null
+
+    const logs = res
+      .slice()
+      .reverse()
+      .map(item => ({
+        target_url: item.target_url,
+        bookmark_id: ctx.hashIds.encodeId(item.bookmark_id),
+        action: item.action
+      }))
 
     return {
       logs,
diff --git a/src/infra/repository/dbBookmark.ts b/src/infra/repository/dbBookmark.ts
index 1fe64ad..ac75a96 100644
--- a/src/infra/repository/dbBookmark.ts
+++ b/src/infra/repository/dbBookmark.ts
@@ -707,7 +707,7 @@ export class BookmarkRepo {
     }
   }
 
-  public async getPartialBookmarkChanges(userId: number, time: number) {
+  public async getPartialBookmarkChanges(userId: number, time: number, limit = 5000) {
     const res = await this.prisma().slax_user_bookmark_change.findMany({
       where: {
         user_id: userId,
@@ -716,8 +716,9 @@ export class BookmarkRepo {
         }
       },
       orderBy: {
-        created_at: 'desc'
-      }
+        created_at: 'asc'
+      },
+      take: limit
     })
 
     return res as bookmarkActionChangePO[]
diff --git a/src/infra/repository/dbSyncBatch.ts b/src/infra/repository/dbSyncBatch.ts
index 8a1a6ef..cd61224 100644
--- a/src/infra/repository/dbSyncBatch.ts
+++ b/src/infra/repository/dbSyncBatch.ts
@@ -100,9 +100,13 @@ export class DBSyncBatchOperation {
       where: { uuid: operation.bookmarkUuid }
     })
 
+    if (existingByUuid && existingByUuid.user_id !== operation.userId) {
+      throw ShareActionNotAllowedError()
+    }
+
     if (existingByUuid) {
       await tx.sr_user_bookmark.update({
-        where: { uuid: operation.bookmarkUuid },
+        where: { uuid: operation.bookmarkUuid, user_id: operation.userId },
         data: {
           bookmark_id: bookmark.id,
           deleted_at: null,