diff --git a/dislocker_auth.py b/dislocker_auth.py
index d9c5585..6194034 100644
--- a/dislocker_auth.py
+++ b/dislocker_auth.py
@@ -130,7 +130,7 @@ class Auth():
                 else:
                     # mouse_listの使用中ユーザーを消す
                     cursor.execute("UPDATE mouse_list SET using_member_id = NULL WHERE keyboard_number = %s", (mouse_number,))
-                cursor.execute("UPDATE pc_usage_history SET end_use_time = clock_timestamp(), bot_about = %s WHERE id = %s", (bot_about, pc_usage_history_record_id))
+                cursor.execute("UPDATE pc_usage_history SET end_use_time = clock_timestamp() WHERE id = %s", (pc_usage_history_record_id,))
                 self.db.commit()
                 return {"result": 0, "about": "ok"}