What gameplay feature is this bug affecting?
Den

What's the issue? Please include any error messages you receive and as much detail as possible.
The number of lionesses and cubs shown in the front page of my den is in the negatives, and it's showing that I have 0 lions with mutations in my pride when that is incorrect.

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
https://www.lioden.com/territory.php?id=184109

Any screenshots you can provide us with?
(in case this just happens to be on my end)
https://imgur.com/kLPI9Ez

Please provide us with step by step explanation how this bug happened so we can attempt to replicate it. If it's complex, please include screenshots where possible:
I sell karma fodder every morning, including any cubs born that I don't want. I sold 11 lionesses with a total of 12 cubs attached, though I am not sure if this is a cause of it because I did not check the lioness/cub numbers before they happened to be sold. I sold another 40 while I was asleep/just rolled over.

EDIT: Having done a mass NCL claiming this morning, it says I currently have 21 lionesses. Doing the math, I currently have 119 adult lionesses in my pride, so I believe my pride territory is currently set to -98? I don't have enough energy to see if I can go over my normal 150 territory limit at the moment.