Replacing/renewing Document IDs for items

I know theoretically document ids are supposed to be unique and 9999 out of 10000 will be unique. There seems to any number of reasons why they won't be unique. I have found old format templates seem to be the main cause for us. Anyway I was wondering if there might be a code solution to update/renew the document id of an item in its original location without the need for manual methods. I was figuring there might be a PowerShell script but my searching on the web has proved fruitless. The fact I have not found anything, does that mean it's not possible? Thanks.