diff --git a/app/dao/chat.py b/app/dao/chat.py
index 8f1d839..cd24531 100644
--- a/app/dao/chat.py
+++ b/app/dao/chat.py
@@ -58,7 +58,7 @@ class ChatDAO(BaseDAO):
 			stmt = insert(UserChat).values(user_id=user_id, chat_id=chat_id)
 			await self.session.execute(stmt)
 		except IntegrityError:
-			pass
+			raise UserAlreadyInChatException
 
 	async def change_data(self, chat_id: int, chat_name: str, avatar_image: HttpUrl) -> None:
 		stmt = (
diff --git a/app/services/chat_service.py b/app/services/chat_service.py
index 2010c9f..53ef656 100644
--- a/app/services/chat_service.py
+++ b/app/services/chat_service.py
@@ -51,7 +51,8 @@ class ChatService:
 				avatar_image=user_chat_for.avatar_image
 			)
 			await uow.chat.add_user_to_chat(user_id, chat_id)
-			# await uow.chat.add_user_to_chat(settings.ADMIN_USER_ID, chat_id)
+			if user_id != settings.ADMIN_USER_ID:
+				await uow.chat.add_user_to_chat(settings.ADMIN_USER_ID, chat_id)
 			async with RedisService(is_raise=True) as redis:
 				await redis.delete_key(key=f"user_allowed_chats: {user_id}")
 			await uow.commit()
diff --git a/app/utils/unit_of_work.py b/app/utils/unit_of_work.py
index a1da689..4d2a5ad 100644
--- a/app/utils/unit_of_work.py
+++ b/app/utils/unit_of_work.py
@@ -24,10 +24,9 @@ class UnitOfWork:
 			await self.rollback()
 			await self.session.close()
 		except SQLAlchemyError:
-			pass
-		# 	raise BlackPhoenixException
-		# if isinstance(exc, SQLAlchemyError):
-		# 	raise BlackPhoenixException
+			raise BlackPhoenixException
+		if isinstance(exc, SQLAlchemyError):
+			raise BlackPhoenixException
 
 	async def commit(self):
 		await self.session.commit()