I have a bundle that is assigned to an OU - it creates a folder and
copies a file into it (from the ZCM server). The bundle deployed to
the user correctly. But I have now given this user a newer computer.
The bundle isn't deploying to it. When I look at the Relationships
tab for the user, it lists the bundle under Inherited, but the "Device
Logged In" still lists the old PC. If I go to the Details tab for
this user, the Primary Workstation still lists the old PC, but the
"Devices Logged Into" shows only the new one.

How do I resolve this?

In case it matters:
The primary server has been upgraded to 10.3.1.
Everything else is still at 10.3.