How do I add a pop up warning message if updating the state field to Cancelled with open child tasks

[matthew_hughes]

In the incident table, if a user sets an active incident to the state of Cancelled, but the incident has open incident tasks, I'm wanting to add a warning message that If you choose to cancel this incident then all non-closed tasks will be updated as Cancelled. The warning message should have a confirm and cancel buttons. There are two things that I'm wanting to know:

1. How do I add the warning message if the user changes the incident to Cancelled?
2. How do I change the the state of the related incident tasks to Cancelled.

[matthew_hughes]

Hi @Riya Verma Thanks very much. I'll give that a try and let you know how I get on.