change in iotdata if tank not found for tankhardwareId

src/controllers/tanksController.js

@@ -1342,6 +1342,9 @@ exports.IotDevice = async (req, reply) => {
     // Update waterlevel in tanksSchema for each tank
     for (const tank of tanks) {
       const { tankhardwareId, tankHeight } = tank;
+      if (!existingTank) {
+        continue; // Skip the rest of the loop body and move to the next iteration
+      }
      // console.log(tankhardwareId)
       // Find the corresponding tank in tanksSchema
       const existingTank = await Tank.findOne({ hardwareId, tankhardwareId });