Primary Activity Days disappeared

I had a bunch of deacons showing up in the list of members of Primary Activity Days members. I tried to get them out, but it wouldn't work. I don't know what I have done, but the Activity Days group has now disappeared altogether. Our two Activity Days Leaders now show as not even having callings. I've hunted everywhere for some way to reset the standard class list, or to manually create the Activity Days grouping, but can't find anything anywhere. Can anyone advise how to get Activity Days back as a group under primary?

You can add Activity Days back by following these steps:
* LCR Menu > Organizations > Primary
* Click the pencil icon to the right of the Primary title on the page
* Choose Add Activity Days from the menu

We will look into why the system didn't block you from removing the class. There may be some configuration that needs to be corrected.

Thankyou!!!
I think I clicked on everything, else a million times, but hadn't seen that pencil.