Steps to reproduce

1. Deploy a process definition in 3 different versions
2. Start a process instance for version 1
3. Go to Cockpit and open the running process instance
4. Click the link to migrate the process instances to the latest version (arrow-up)

Observed behavior
The migration view suggests the operation automatically for two latest versions (2->3)

Expected behavior
The migration view should consider for which process definition version the operation was started