How do you backtrack to the previous node in activiti?

In Activiti, you can use the following method to roll back a process instance to the previous node:

1. service that runs during the execution of a program
2. Create a modification for a process instance
3. call off the activity
4. ActivityStartBefore
5. beginBeforeTypeOfActivity

runtimeService.createProcessInstanceModification(processInstanceId)
    .cancelActivity(currentActivityId)
    .startBeforeActivity(previousActivityId)
    .execute();

1. By setting a fallback path or condition in the BPMN file, the process instance is automatically sent back to the previous node, allowing for the direct definition of fallback rules during process design.

Regardless of the method chosen, it is important to address issues such as process instance status and data consistency to ensure that the process instance can correctly return to the previous node.