I've made a new forum group and added a placeholder description.
After going back to edit it, I get a "Oh no, that tag is taken 😦" message.
I tried editing my second forum group's description - got the same message.
We are unable to change the group tags to begin with, so I really have no idea why it's even giving me that message.
The edited description does not go through, not even after waiting 30 minutes for cache to catch up.
Happens in Firefox and Chrome, does not appear to be browser-dependent.
[edit] January 3rd 2017 - this is still happening.
Just tried this on one of my own groups, I'm getting the same thing. It's no big deal for me but I'll be glad when it's resolved.
Can you check and see if this is still happening to you? I just changed the description!
Dexter by ❤