diff --git a/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.2.0_schema/postgresql/dolphinscheduler_ddl.sql b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.2.0_schema/postgresql/dolphinscheduler_ddl.sql
index 5e3bb0d42108..8b6dbba36b14 100644
--- a/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.2.0_schema/postgresql/dolphinscheduler_ddl.sql
+++ b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.2.0_schema/postgresql/dolphinscheduler_ddl.sql
@@ -119,4 +119,3 @@ d//
 delimiter ;
 select uc_dolphin_T_t_ds_task_instance_R_test_flag();
 DROP FUNCTION uc_dolphin_T_t_ds_task_instance_R_test_flag();
-create index idx_task_instance_process_instance_flag on t_ds_task_instance (process_instance_id, flag);