Running deleted campaign don't get their directive cleaned-up
If a campaign is deleted when it was running (and so, the directive/rule were created), then the configuration elements are not cleaned up.
Then, if you try to create a new campaign with the same name, you get an infinite log that kill the server/fill the disks:
[2022-11-25 16:10:08+0000] ERROR campaign - Inconsistency: Cannot set directive with name ' #1' : this name is already in use.
(yes, name was empty, because I didn't noticed I forgot to put one both time)
Workaround: delete the new campaign, then create one with a different name.
Solution: directive/rule of a running event must be deleted if the campaign is deleted (and a generation triggered).
Bonus: make name mandatory for campaign.