diff --git a/sql/version_update.sql b/sql/version_update.sql
index 7089f86..9a2ec51 100644
--- a/sql/version_update.sql
+++ b/sql/version_update.sql
@@ -99,7 +99,6 @@ SET FOREIGN_KEY_CHECKS = 0;
 -- ----------------------------
 -- Table structure for pay_casebook
 -- ----------------------------
-DROP TABLE IF EXISTS `pay_casebook`;
 CREATE TABLE `pay_casebook`  (
   `ID` int(11) NOT NULL AUTO_INCREMENT,
   `UpdateTime` datetime(0) NOT NULL,
@@ -170,7 +169,6 @@ SET FOREIGN_KEY_CHECKS = 0;
 -- ----------------------------
 -- Table structure for report
 -- ----------------------------
-DROP TABLE IF EXISTS `report`;
 CREATE TABLE `report` (
   `ReportId` int NOT NULL AUTO_INCREMENT,
   `UpdateTime` date DEFAULT NULL,
@@ -198,7 +196,6 @@ SET FOREIGN_KEY_CHECKS = 0;
 -- ----------------------------
 -- Table structure for pay_casebook
 -- ----------------------------
-DROP TABLE IF EXISTS `peis_reserve`;
 CREATE TABLE `peis_reserve`  (
   `ID` int NOT NULL AUTO_INCREMENT,
   `UpdateTime` datetime NOT NULL,