diff --git a/ybirk/clickhouse/task_220_&_221.sql b/ybirk/clickhouse/task_220_&_221.sql
index 1b86b21..60480b9 100644
--- a/ybirk/clickhouse/task_220_&_221.sql
+++ b/ybirk/clickhouse/task_220_&_221.sql
@@ -136,6 +136,8 @@ GROUP BY
     flv.course_id,
     c.title;
 
+DROP VIEW IF EXISTS ybirk.mv_inactive_users_summary ON CLUSTER clickhouse_cluster;
+
 CREATE MATERIALIZED VIEW ybirk.mv_inactive_users_summary ON CLUSTER clickhouse_cluster
 TO ybirk.inactive_users_summary
 AS
@@ -148,10 +150,7 @@ SELECT
     u.registration_date AS registration_date
 FROM ybirk.core_user AS u
 LEFT JOIN ybirk.core_enrollments AS e ON u.user_id = e.user_id
-WHERE u.user_id NOT IN (
-    SELECT DISTINCT user_id
-    FROM ybirk.core_fact_lesson_views
-)
+LEFT ANTI JOIN ybirk.core_fact_lesson_views AS flv ON u.user_id = flv.user_id
 GROUP BY
     u.user_id,
     u.name,