diff --git a/db/postgresql/migrations/04_remove_casade_delete/migration.sql b/db/postgresql/migrations/04_remove_casade_delete/migration.sql
index d0995938..aa1f7805 100644
--- a/db/postgresql/migrations/04_remove_casade_delete/migration.sql
+++ b/db/postgresql/migrations/04_remove_casade_delete/migration.sql
@@ -17,7 +17,7 @@ ALTER TABLE "session" DROP CONSTRAINT IF EXISTS "session_website_id_fkey";
 ALTER TABLE "website" DROP CONSTRAINT IF EXISTS "website_user_id_fkey";
 
 -- AddForeignKey
-ALTER TABLE "event" ADD CONSTRAINT EXISTS "event_session_id_fkey" FOREIGN KEY ("session_id") REFERENCES "session"("session_id") ON DELETE RESTRICT ON UPDATE CASCADE;
+ALTER TABLE "event" ADD CONSTRAINT "event_session_id_fkey" FOREIGN KEY ("session_id") REFERENCES "session"("session_id") ON DELETE RESTRICT ON UPDATE CASCADE;
 
 -- AddForeignKey
 ALTER TABLE "event" ADD CONSTRAINT "event_website_id_fkey" FOREIGN KEY ("website_id") REFERENCES "website"("website_id") ON DELETE RESTRICT ON UPDATE CASCADE;