What does the "Automation could not be updated as" error message mean?

Question

I am trying to edit an automation but Support is not letting me save the changes and I receive the following error:

Answer

You are receiving this error message because the changes made to your automation do not have a nullifying condition telling the automation when to stop running. You could fix this one of two ways:

Modify the automation to include a nullifying condition

The error message, itself, gives you an example of a way you can set up a nullifying condition. If one of the actions is "Priority is Urgent", then make the nullifying condition, "Priority is High". Another way this can be done is by creating a nullifying condition using tags, ensuring the automation only runs once. For more information, see the article: About automations and how they work. 

Create a trigger instead

Oftentimes, this error message appears because you are setting up an automation to take any action that would be better accomplished by a trigger. If the conditions in your automation are not time-based, create a trigger instead. To understand the difference between automation and triggers, see the article: What is the difference between triggers and automations?