update

Freemud.Coupon.ExportCode/Services/CouponService.cs

@@ -128,7 +128,7 @@ namespace Freemud.Coupon.ExportCode.Services
             bool isSuccess = false;
             using (DbManager db = CreateDbManagerCouponReport())
             {
-                var ret = db.SetCommand(@"delete from [dbo].[Coupon_Export_Record] where id=@id",
+                var ret = db.SetCommand(@"delete from [dbo].[Coupon_Export_Record] where id=@id and ExportStatus = 0",
                  db.ParameterEx("@id", id, DbType.Int32))
                 .ExecuteNonQuery();