What gameplay feature is this bug affecting?
Achievements

What's the issue? Please include any error messages you receive and as much detail as possible.
I had a cub born and never got the achievement for him having a common base. The achievement was already put in place when he was IBFed. I got other breeding achievements but not that one. He has Luteo base

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/lion.php?id=794148898403

Any screenshots you can provide us with?


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 saw the new achievements, IBFed a pregnant lioness to get some achievements done. Realized he had a common base and the achievement was still marked "in progress" after he was born.