Preconditions allow you to execute a post function only under certain circumstances.Select whether you require the precondition to be true or false to run the rule. Here, we haven't configured any, so we can leave the default setting.

How to set up the Linked Transition post function

Learn how to set rules to:
1. Automatically transition an issue to DONE when its child issues are transitioned to DONE.
2. Add a conditional status to the sibling issues.

Post function configuration: Linked Transition (JSU)