diff --git a/program/serializers.py b/program/serializers.py
index e49166955e23749e0b2c8a5bce680a0fea95b5ce..97d8df0ac9ccec24787555e23d319dfcb24e2024 100644
--- a/program/serializers.py
+++ b/program/serializers.py
@@ -821,15 +821,14 @@ class ScheduleInRequestSerializer(ScheduleSerializer):
 
 
 class CollisionSerializer(serializers.Serializer):
-    id = serializers.IntegerField()
     start = serializers.DateTimeField()
     end = serializers.DateTimeField()
     playlist_id = serializers.IntegerField(allow_null=True)
     show_id = serializers.IntegerField()
     show_name = serializers.CharField()
-    repetition_of_id = serializers.IntegerField(allow_null=True)
     schedule_id = serializers.IntegerField()
     memo = serializers.CharField()
+    timeslot_id = serializers.IntegerField()
     note_id = serializers.IntegerField(allow_null=True)