Problem with symmer event quest

I did the "Professionals For Every Job" quest for the summer event. I received the rewards, the quest is finished and I am experiencing the following:
According to the quest 1000 settlers were delegated from my population which is shown in the upper left settler icon (19570/20570). But if you observe my storage the population is (20570/20570), meaning that nothing was delegated from there.
As a result I cannot produce the 1000 settlers missing, neither can I add it from my star. I receive the message that my population is full and if I want more I might build residences.
I am sorry I dont have screenshots, lightshot seems not to be working properly (cannot upload)

Thanks in advance

Never mind about it, forget it, problem solved