diff --git a/ee/scripts/helm/db/init_dbs/postgresql/init_schema.sql b/ee/scripts/helm/db/init_dbs/postgresql/init_schema.sql
index 527e0f0ae..182d19a72 100644
--- a/ee/scripts/helm/db/init_dbs/postgresql/init_schema.sql
+++ b/ee/scripts/helm/db/init_dbs/postgresql/init_schema.sql
@@ -1010,7 +1010,7 @@ $$
                 }'::jsonb
             );
             CREATE INDEX alerts_project_id_idx ON alerts (project_id);
-            CREATE INDEX alerts_project_id_idx ON alerts (series_id);
+            CREATE INDEX alerts_series_id_idx ON alerts (series_id);
             CREATE TRIGGER on_insert_or_update_or_delete
                 AFTER INSERT OR UPDATE OR DELETE
                 ON alerts