[CM9.1.0.7][BUG]Cannot show backup plan logs.

1.Install CUBRID Manager 9.1.0.7 ,CUBRID 9.1 (9.1.0.0204)
2.Login CM
3.Connect localhost
4.Choose a database.
5.Choose job automation
6.Right click a Backup plan and Add backup Plan "a"
7.Double click the Backup plan and Job automation dashboard will be shown.
8.In the left Hosts list ,right click backup Plan "a" and delete.
9.Click Job automation dashboard and click 'NO' in the confirm window.
10.In Job automation dashboard ,right click and add backup Plan named "a".

Actual result:
In Job automation dashboard,right click "a" and click edit ,the edit window will be shown.
But the "Show backup plan logs" is invalid.