diff --git a/resolvers/stat.py b/resolvers/stat.py
index 33cd8cc5..9ae00aea 100644
--- a/resolvers/stat.py
+++ b/resolvers/stat.py
@@ -1,3 +1,5 @@
+import asyncio
+
 from sqlalchemy import and_, distinct, func, join, select
 from sqlalchemy.orm import aliased
 
@@ -260,9 +262,12 @@ def author_follows_topics(author_id: int):
 async def update_author_stat(author_id: int):
     author_query = select(Author).where(Author.id == author_id)
     try:
-        [author_with_stat] = get_with_stat(author_query)
-        if isinstance(author_with_stat, Author):
-            author_dict = author_with_stat.dict()
-            await cache_author(author_dict)
+        result = get_with_stat(author_query)
+        if result and len(result) == 1:
+            author_with_stat = result[0]
+            if isinstance(author_with_stat, Author):
+                author_dict = author_with_stat.dict()
+                # await cache_author(author_dict)
+                asyncio.create_task(cache_author(author_dict))
     except Exception as exc:
         logger.error(exc, exc_info=True)
diff --git a/services/cache.py b/services/cache.py
index bb8f435c..1853d195 100644
--- a/services/cache.py
+++ b/services/cache.py
@@ -1,3 +1,4 @@
+import asyncio
 import json
 from typing import List
 
@@ -81,11 +82,12 @@ async def get_cached_author_by_user_id(user_id: str, get_with_stat) -> dict:
     if not author_id:
         author_query = select(Author).filter(Author.user == user_id)
         result = get_with_stat(author_query)
-        if result:
-            [author_with_stat] = result
-            if author_with_stat:
-                await cache_author(author_with_stat.dict())
+        if result and len(result) == 1:
+            author_with_stat = result[0]
+            if isinstance(author_with_stat, Author):
                 author_dict = author_with_stat.dict()
+                # await cache_author(author_dict)
+                asyncio.create_task(cache_author(author_dict))
     else:
         author_str = await redis.execute("GET", f"author:id:{author_id}")
         if author_str:
diff --git a/services/triggers.py b/services/triggers.py
index a9834f0f..c4586d3b 100644
--- a/services/triggers.py
+++ b/services/triggers.py
@@ -66,9 +66,14 @@ def after_reaction_update(mapper, connection, reaction: Reaction):
     try:
         # reaction author
         author_subquery = select(Author).where(Author.id == reaction.created_by)
-        [author_with_stat] = get_with_stat(author_subquery)
-        if isinstance(author_with_stat, Author):
-            asyncio.create_task(cache_author(author_with_stat.dict()))
+
+        result = get_with_stat(author_subquery)
+        if result and len(result) == 1:
+            author_with_stat = result[0]
+            if isinstance(author_with_stat, Author):
+                author_dict = author_with_stat.dict()
+                # await cache_author(author_dict)
+                asyncio.create_task(cache_author(author_dict))
 
         # reaction repliers
         replied_author_subquery = (
diff --git a/services/webhook.py b/services/webhook.py
index 7cc29820..2e1d32aa 100644
--- a/services/webhook.py
+++ b/services/webhook.py
@@ -1,3 +1,4 @@
+import asyncio
 import os
 import re
 
@@ -50,9 +51,12 @@ class WebhookEndpoint(HTTPEndpoint):
                         session.add(author)
                         session.commit()
                         author_query = select(Author).filter(Author.user == user_id)
-                        [author_with_stat] = get_with_stat(author_query)
-                        if author_with_stat:
-                            await cache_author(author_with_stat)
+                        result = get_with_stat(author_query)
+                        if result and len(result) == 1:
+                            author_with_stat = result[0]
+                            author_dict = author_with_stat.dict()
+                            # await cache_author(author_with_stat)
+                            asyncio.create_task(cache_author(author_dict))
 
             return JSONResponse({"status": "success"})
         except HTTPException as e: