Before closing a task that is waiting on another task, ClickUp can (optionally) display a warning message to ensure you aren't missing anything.
You have the power to enable (and disable) this warning at any time.
How to enable (or disable the warning)
- Visit your Settings page
- Click the ClickApps item in your left-sidebar
- Locate the Dependency Warning ClickApp
- Select which Spaces to enable (or disable)