Access the Workspace section inside ⚙️ Settings and manage all your dependencies preferences there.
You can select how you would like to manage once someone starts to work on a task that depends on an uncompleted task:
Allow to start working: No message will appear and the user can start working on it with no problem;
Warn and ask for confirmation: Once the user tries to start to work on it, a pop-up will inform that the task has a dependency and ask for their confirmation to proceed;
Do not allow to start working: The user won't be able to do so and will receive an error message when trying to start working on it.