How to Change Costing Period Status Back from Open to Never Opened

Summary:

Hi Team,

In cost management, accidentally future costing period has been opened. Can we change the status back to Never Opened from Open status?

Also, let me know would it impact anything by keeping future opened. However, we know we can restrict transactions by providing cut-off date to end of current period.

I would like to know cons of keeping future period opened.

Thanks