diff --git a/projects/views.py b/projects/views.py
index d111d6a..64c8da8 100644
--- a/projects/views.py
+++ b/projects/views.py
@@ -85,6 +85,7 @@ class ProjectSetRepresentAPIView(APIView):
             return Response({"message": "Not owner"}, status=status.HTTP_403_FORBIDDEN)
         if before_represent := Project.objects.filter(owner=user, is_represent=True).first():
             before_represent.is_represent = False
+            before_represent.save()
         project.is_represent = True
         project.save()
         return Response({"message": "change represent success"}, status=status.HTTP_200_OK)