Tickets are shared across your entire account when they are set up. This allows you to assign and re-use the same ticket type on multiple classes.
If you need to edit specific details (like a description or the total price), you can do this in your Profile settings and it will change the details across all of the classes the ticket has been assigned to.
Go to Profile > Tickets to make changes.
The list will show you how many classes the ticket is currently active on. Your changes will apply to all of them.
Click the edit icon to make changes. A list of the classes affected by the changes is displayed on the right hand side.