I recently started playing again and got trigger happy and started all of my players off training new roles and abilities without understanding that this then prevents them gaining attributes towards the next star. I didn't know this and am now really annoyed I can't reverse the decision and now my whole squad will be stuck at their star level.

What can I do? If I pause the training will that allow the players to gain attributes? If not, what is the point in the pause function?

Thanks for your help in advance guys.