diff --git a/migrations/V006__add_season_end_date.sql b/migrations/V006__add_season_end_date.sql
index 70624a1..47d5af7 100644
--- a/migrations/V006__add_season_end_date.sql
+++ b/migrations/V006__add_season_end_date.sql
@@ -1,3 +1,5 @@
 SET time_zone='+00:00';
 
-UPDATE league_season SET end_date = "2021-10-31 23:59:00" WHERE league_season.id>2;
+UPDATE league_season SET end_date = "2021-10-31 23:59:00" WHERE end_date IS NULL;
+
+ALTER TABLE league_season MODIFY COLUMN end_date DATETIME NOT NULL;
\ No newline at end of file