diff --git a/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.1.1_schema/postgresql/dolphinscheduler_ddl.sql b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.1.1_schema/postgresql/dolphinscheduler_ddl.sql
index 1d10ad01d0..902b6009cc 100644
--- a/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.1.1_schema/postgresql/dolphinscheduler_ddl.sql
+++ b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.1.1_schema/postgresql/dolphinscheduler_ddl.sql
@@ -15,4 +15,4 @@
  * limitations under the License.
 */
 --- add column
-ALTER TABLE t_ds_task_group alter COLUMN description type varchar(255);
\ No newline at end of file
+ALTER TABLE t_ds_worker_group ADD COLUMN IF NOT EXISTS description varchar(255) DEFAULT NULL;