Confluence Attachment Version Issue

[cwssupport]

I have a client who has sent out a communication containing a link to a specific attachment version. Something like: 

http://hostname:8080/download/attachments/31799912/TEST.pdf?version=2&modificationDate=1423603269604&api=v2

The problem that we have is that the attachment has now been updated, creating a new version and effectively breaking the link.

In dev, I have replicated this and tried to update the attachment data directly in the database, using the below:

update ATTACHMENTDATA
set DATA = (select DATA from ATTACHMENTDATA where ATTACHMENTID = <new version id>)
where ATTACHMENTID = <v2 id>

This seems to corrupt the file.

Any help would be great as I've hit a brick wall with this.

1. Can I edit a specific version of an attachment?
2. Can I copy the data of one version to another?
3. Can I redirect a specific url?

[NotTheRealStephenSifersNOPENOPENOPENOPE]

Is there a requirement to link the very specific version of the attachment?

A work around would be to link to the latest greatest version of the file, such as:

http://hostname:8080/download/attachments/31799912/TEST.pdf

Doing the above will always link you to the latest version of the file regardless if it has been updated, saved, or reverted.