diff --git a/app/models/project.rb b/app/models/project.rb
index 37b760a..62e8b70 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -68,6 +68,7 @@ class Project
       else
         t = "period_start_date" if t == "period"
         fields_to_remove << t if (datas.where(t.to_sym.ne => nil).count == 0 rescue false)
+        t = "period" if t == "period_start_date"
       end
       pd_title <<  {
           "plugin_data_title" => I18n.t("personal_project.#{t}")