Update 'src/controllers/tanksController.js'

src/controllers/tanksController.js

@@ -1346,7 +1346,7 @@ exports.totalwaterLevelSum = async (request, reply) => {
     }
   ]);
 
-  const result = waterlevelSum[0]?.totalWaterlevel ?? 0;
+  const result = waterlevelSum[0]?totalWaterlevel : 0;
 
   reply.send({ waterlevelSum: result });
 }