If you want to change a distribution partway through its use but you want to leave all existing tasks active, you can copy the distribution, alter it as needed, and then retire the original distribution on a defined date. When you retire a distribution, you preserve any existing data and pending tasks but prevent future tasks from generating.
To retire one distribution, click the menu cog to the right of the distribution name and select 'Retire Distribution'.
To retire multiple distributions at once, click the checkbox beside distribution names and click the 'Retire Distribution' button.
Set a Retirement Date for the distribution(s). As of this date, no more tasks will generate for this distribution.
Click 'Retire'
You will get a success message and can click to return to the Distribution index.
Retired distributions will still display on the list of Distributions, but they will have a small orange clock beside the name to show they have been retired.
An informational notice will be included on distributions that are set to retire soon. The notice will be seen when you access the Progress Report for a distribution.
If you delete a distribution you will no longer see it in the list of Distributions and it can't be recovered through the user interface.
Click the checkbox beside a distribution name.
Click 'Delete Distribution'
Confirm your decision.