Change of the owner of an invoice do not to change the owner of the invoice items

Hello
This is the situation:
I created an invoice as user(1), but later I needed to change its author to another user, (3). When logged as user(3), I was able to edit the invoice, but the items were not there.
Then I logged back as user(1) and the items came back.
I checked the db table invoice_items, and notice a column UID that have the old "1" values. I manually edit the respective rows and was able to see the items as user(3) as supposed to.

If you need more info, please let me know
Thank you