diff --git a/science_article_add/science_article_add/spiders/wos_latest_increment.py b/science_article_add/science_article_add/spiders/wos_latest_increment.py
index 8808361..68422c5 100644
--- a/science_article_add/science_article_add/spiders/wos_latest_increment.py
+++ b/science_article_add/science_article_add/spiders/wos_latest_increment.py
@@ -43,6 +43,7 @@ class WosLatestIncrementSpider(scrapy.Spider):
         self.query_condition = task_obj['task_condition']
 
         self.first_page = task_obj.get('first_page', 1)
+        self._records_found = 0
 
     async def start(self):
         full_query = self.query_content