diff --git a/src/controllers/tanksController.js b/src/controllers/tanksController.js
index 12e4304e..e29f5db2 100644
--- a/src/controllers/tanksController.js
+++ b/src/controllers/tanksController.js
@@ -6218,7 +6218,7 @@ async function processIotData(hw_Id, data) {
       if (tankHeight <= 0) {
         const now = moment().tz('Asia/Kolkata');
       
-        if (existingTank.slave_status === "working" || !existingTank.slave_status) {
+        if (existingTank.slave_status === "working") {
           // First time signal is lost
           existingTank.slave_status = "signal_lost1";
           existingTank.slave_signal_lost_time = now.format('DD-MMM-YYYY - HH:mm:ss');