When migrating a process with an incident (of type externalTask or failedJob), the process definition of the incident is not migrated to the new process definition. This happens when the incident has been created by a child process and the parent process is migrated.

table ACT_RU_INCIDENT column PROC_DEF_ID_ contains the old process definition after migration (REV_=1)

Failing test case: https://github.com/ThorbenLindhauer/camunda-engine-unittest/tree/CAM-6173