diff --git a/script/3.4/schema/1.update_project_correlation.sql b/script/3.4/schema/1.update_project_correlation.sql
index afe1439..1bfbaa1 100644
--- a/script/3.4/schema/1.update_project_correlation.sql
+++ b/script/3.4/schema/1.update_project_correlation.sql
@@ -1,16 +1,11 @@
 alter table project_correlation
-    add "maintenanceETime" timestamp with time zone;
+    add "maintenance_end" timestamp with time zone;
 
-comment on column project_correlation."maintenanceETime" is '维保结束时间'
+comment on column project_correlation."maintenanceETime" is '维保结束时间';
 
 alter table project_correlation
-    add "maintenanceSTime" timestamp with time zone;
+    add "maintenance_start" timestamp with time zone;
 
 comment on column project_correlation."maintenanceSTime" is '维保开始时间';
 
 
-alter table project_correlation
-    rename column "maintenanceETime" to maintenance_end;
-
-alter table project_correlation
-    rename column "maintenanceSTime" to maintenance_start;