Internal order status change

Hello Gurus,

I need to change an Internal Order status which is currently in 30 (Technically completed) to 20, a user has by mistake has updated status to 30.

I try to change the status in OK02 transaction, but i couldn't do so,

Could any one advise how to change the order status? is it possible to reset the status at table level.

Thanks in advance

Babu.