Archiving a published program is no disaster, but here is what you need to know.

There is nothing in place stopping a published program from being archived. The green button next to a title will however tell you if the program, or any related events and contents to the program are published anywhere.

When a published program is archived it will automatically unpublish from the pressweb and won't be found in the front end catalogue.

If a program is published to a schedule when archived, the event will be given a TBA status. 

Publish an archived program
An archived program, related events and content can at any point be 'Unarchived' to be published again. When publishing a program again the event will appear in the program catalogue, but it will not automatically appear in schedules. The event will instead be TBA until the next import.