diff --git a/src/controllers/installationController.js b/src/controllers/installationController.js
index eaa6c179..b3d72e38 100644
--- a/src/controllers/installationController.js
+++ b/src/controllers/installationController.js
@@ -1621,7 +1621,8 @@ exports.getIotDataByCustomer = async (req, reply) => {
         ? "GSM is connected"
         : "GSM is not connected";
 
-      const tanks = connectedSlaves.map(slave => {
+      // Map connected slaves to tank details
+      let tanks = connectedSlaves.map(slave => {
         const slaveId = slave.hardwareId?.trim();
         const matchedTank = latestRecord.tanks.find(tank => tank.tankhardwareId === slaveId);
 
@@ -1640,6 +1641,9 @@ exports.getIotDataByCustomer = async (req, reply) => {
         };
       });
 
+      // ❗ Remove the first tank entry
+      tanks = tanks.slice(1);
+
       return {
         hardwareId,
         message,