diff --git a/scheduler/schedule.cpp b/scheduler/schedule.cpp
index eb2d968..18f9121 100644
--- a/scheduler/schedule.cpp
+++ b/scheduler/schedule.cpp
@@ -519,7 +519,6 @@ int SensorScheduler::UpgradeSensor(int short_addr, std::string sensor_type, int
     info.upgrade_sw_version = upgrade_sw_version;
     long ts = GetLocalTs();
     info.submit_time = GetUTCTime(ts);
-    info.try_world_time1 = "";
     upgrade_[id] = info;
     zlog_info(zbt, "[%d] short addr:%x add upgrade info", id, short_addr);
     UpgradeCfg::WriteCfg(upgrade_);