Is it possible to change General Ledger Calender after setting?

Summary:

General Ledger Calendar was already set but now we would like to change the number of Adjusting Period from 3 to 1.

Content (please ensure you mask any confidential information):

The screen shot shows the "Manage of Accounting Calendar" and we can see that this calendar has three Adjusting Periods.

I understand that Adjusting Periods can be changed from 3 to 1 by clicking on checkbox , but there will be two extra Accounting period after changing. How can I delete extra accounting period?

For example, 2028-06ADJ and 2028-09ADJ needed to be deleted and 2028-12ADJ only is necessary.

I would appreciate if you could reply to the above question.