diff --git a/database/upgrade/upg_u_sub_user.sql b/database/upgrade/upg_u_sub_user.sql
index 618c780e..baf1842c 100644
--- a/database/upgrade/upg_u_sub_user.sql
+++ b/database/upgrade/upg_u_sub_user.sql
@@ -2,7 +2,7 @@
 -- Table structure for table `u_sub_user`
 --
 -- DROP TABLE IF EXISTS `u_sub_user`; 
-CREATE TABLE `u_sub_user` (
+CREATE TABLE IF NOT EXISTS `u_sub_user` (
   `id` int NOT NULL AUTO_INCREMENT COMMENT '主键',
   `imsi` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT 'SIM卡/USIM卡ID',
   `msisdn` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '' COMMENT '用户电话号码',