diff --git a/APIServer.exe b/APIServer.exe
index 08704c3..c6f0f71 100644
Binary files a/APIServer.exe and b/APIServer.exe differ
diff --git a/ews/ews.go b/ews/ews.go
index 0a6f26b..260d0db 100644
--- a/ews/ews.go
+++ b/ews/ews.go
@@ -130,8 +130,8 @@ func (e *EWS) SetUutInfo(cfg cnf.Cfg, logger *log.Logger, host string, addr stri
 
 	//如果此USN的记录存在与uutinfo表中, 且此USN的MAC/Item/Status/Message已变化, 则:
 	//1. 备份此USN对应记录行到uutinfobkup表
-	//2. 更新uutinfo表中对应USN记录的MAC/Item/Status/Message/PartNO/MO/SKU/Line/Stage
-	//3. 更新uutinfo表中此USN记录行的last_ack和last_change栏位为当前时间
+	//2. 删除uutinfo表中对应USN记录的MAC/Item/Status/Message/PartNO/MO/SKU/Line/Stage
+	//3. 新增此USN的最新记录到uutinfo表
 	extFlag := false
 	chgFlag := false
 
@@ -198,7 +198,31 @@ func (e *EWS) SetUutInfo(cfg cnf.Cfg, logger *log.Logger, host string, addr stri
 			return rst
 		}
 
-		stmt, err = tx.Prepare("UPDATE uutinfo SET mac=?, ipaddr=?, relay=?, item=?, status=?, message=?, partno=?, mo=?, sku=?, line=?, stage=?, last_ack=NOW(), last_change=NOW() WHERE usn=?;")
+		// stmt, err = tx.Prepare("UPDATE uutinfo SET mac=?, ipaddr=?, relay=?, item=?, status=?, message=?, partno=?, mo=?, sku=?, line=?, stage=?, last_ack=NOW(), last_change=NOW() WHERE usn=?;")
+		// if err != nil {
+		// 	tx.Rollback()
+		// 	logger.Printf("[ERR]  %s; %s; %#v; %s\r\n", addr, uri, params, err.Error())
+		// 	rst["RESULT"] = "NG"
+		// 	rst["ErrMsg"] = err.Error()
+		// 	return rst
+		// }
+		// defer stmt.Close()
+		// _, err = stmt.Exec(
+		// 	params["MAC"],
+		// 	addr,
+		// 	host,
+		// 	params["ITEM"],
+		// 	params["STATUS"],
+		// 	params["MESSAGE"],
+		// 	params["PARTNO"],
+		// 	params["MO"],
+		// 	params["SKU"],
+		// 	params["LINE"],
+		// 	params["STAGE"],
+		// 	params["USN"],
+		// )
+
+		stmt, err = tx.Prepare("DELETE FROM uutinfo WHERE usn=?;")
 		if err != nil {
 			tx.Rollback()
 			logger.Printf("[ERR]  %s; %s; %#v; %s\r\n", addr, uri, params, err.Error())
@@ -207,7 +231,25 @@ func (e *EWS) SetUutInfo(cfg cnf.Cfg, logger *log.Logger, host string, addr stri
 			return rst
 		}
 		defer stmt.Close()
+		_, err = stmt.Exec(params["USN"])
+		if err != nil {
+			tx.Rollback()
+			logger.Printf("[ERR]  %s; %s; %#v; %s\r\n", addr, uri, params, err.Error())
+			rst["RESULT"] = "NG"
+			rst["ErrMsg"] = err.Error()
+			return rst
+		}
+
+		stmt, err = tx.Prepare("INSERT INTO uutinfo (usn,mac,ipaddr,relay,item,status,message,partno,mo,sku,line,stage,first_ack,last_ack,last_change) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?);")
+		if err != nil {
+			tx.Rollback()
+			logger.Printf("[ERR]  %s; %s; %#v; %s\r\n", addr, uri, params, err.Error())
+			rst["RESULT"] = "NG"
+			rst["ErrMsg"] = err.Error()
+			return rst
+		}
 		_, err = stmt.Exec(
+			params["USN"],
 			params["MAC"],
 			addr,
 			host,
@@ -219,7 +261,9 @@ func (e *EWS) SetUutInfo(cfg cnf.Cfg, logger *log.Logger, host string, addr stri
 			params["SKU"],
 			params["LINE"],
 			params["STAGE"],
-			params["USN"],
+			ui.FirstAck,
+			"NOW()",
+			"NOW()",
 		)
 		if err != nil {
 			tx.Rollback()