Reposting of CO document

Hi,

It was observed that some of the documents has been posted without internal order by using t.code:KB61. Now they are looking for is it possible to assign Internal orders to the already postsed documents.

Or Is it required to reverse the documents already posted and post with internal orders.

Let me know the procedure for the above situations.

Looking for early response, as i need to suggest the procedure to my client.

Thanks in advance

Prasad