diff --git a/shimatta_kenkyusho/parts/views.py b/shimatta_kenkyusho/parts/views.py
index 81d8a25..585f19f 100644
--- a/shimatta_kenkyusho/parts/views.py
+++ b/shimatta_kenkyusho/parts/views.py
@@ -598,7 +598,7 @@ class StockViewDetail(LoginRequiredMixin, BaseTemplateMixin, DetailView):
 
         if 'submit-add-storage' in request.POST:
             return self.handle_add_storage_post(request, **kwargs)
-        if 'submit-change-storage' in request.POST:
+        elif 'submit-change-storage' in request.POST:
             return self.handle_change_storage_post(request, **kwargs)
         elif 'submit-delete-storage' in request.POST:
             return self.handle_del_storage_post(request, **kwargs)