User blog comment:Jens Ingels/The Breeding System: The Earning Rate/@comment-11220861-20130628061816/@comment-10760902-20130630110915

I know this bug, read it from the SP dragoncity forum, you should clean the cache of the game, the login again then you can claim it. This bug is also informed when you click report page, they have a list of known issues in there (include this one)