diff --git a/app.py b/app.py
index 758ba93..a28a87b 100644
--- a/app.py
+++ b/app.py
@@ -122,15 +122,15 @@ def worker(id,source,region=None,stream=False):
             
             count += 1
             names = {}
-            # 检查 "xyxy" 键是否为 None
-            if ball.get("xyxy") is None:
-                ball["xyxy"] = []
             for xyxy,_, confidence, class_id,tracker_id in detections:
                 name = model.model.names[class_id]
                 if name in names:
                     print("Name duplicate",name)
                     continue
                 ball =  balls.get(name,{})
+                # 检查 "xyxy" 键是否为 None
+                if ball.get("xyxy") is None:
+                    ball["xyxy"] = []
                 # ball["tkid"] = int(tracker_id)
                 ball["conf"] = round(float(confidence), 2)
                 site = [int(xyxy[0]), int(xyxy[1]), int(xyxy[2]), int(xyxy[3])]