diff --git a/app.py b/app.py
index dede655..abdc605 100644
--- a/app.py
+++ b/app.py
@@ -68,15 +68,22 @@ def worker(id,source,region=None,stream=False):
             detections = detections[(detections.tracker_id != None)]
             
             count += 1
+            names = {}
             for xyxy,_, confidence, class_id, tracker_id in detections:
-                ball =  balls.get(model.model.names[class_id],{})
+                name = model.model.names[class_id]
+                if name in names:
+                    print("Name duplicate",name)
+                    continue
+                ball =  balls.get(name,{})
                 ball["tkid"] = int(tracker_id)
                 ball["conf"] = round(float(confidence), 2)
                 ball["xyxy"] = [int(xyxy[0]), int(xyxy[1]), int(xyxy[2]), int(xyxy[3])]
                 ball["count"] = ball.get("count",0) + 1
                 if region - count < 3:
                     ball["final"] = ball.get("final",0) + 1
-                balls[model.model.names[class_id]] = ball
+                balls[name] = ball
+                names[name] = True
+            names = {}
             if count < region:
                 continue
             json_data = json.dumps({"table":id,"balls":balls,"time":int(time.time()*1000)})