Hi all, 
Is it possible to make Odoo fetch data from a field in Odoo to another field?
I have tried to make a related field, but then both fields are updated when the "parent" field is updated and the "child" field should not update. 
So for an item no. I have a revision no. and this number I would like to transfer to a field under a specific serial number - which is why I would like it to not update when the revision is changed on the item number as the revision for the specific item number should be historic so we can trace back. 

But is this possible?