What are the steps to reproduce your problem?

1. Run Spring boot app with Camunda 7.12.2
2. Deploy a process model containing a wait state (for example: User task)
3. Start process instance
4. Change the process definition ( for example: add the name of activity)
5. Migrate the running process instance to new process definition

What is the problem?

1. STATE_ is set to null in ACT_HI_PROCINST for the corresponding process instance after migration

What would be the expected behavior:

1. STATE_ should remain "Active" in ACT_HI_PROCINST for the corresponding process instance after migration

Hints (optional):
This is reproducible only on 7.12.2, but it works as expected on 7.12.1.