Removing a trait

Hello guys!

Sorry to bother you all, but I have a question, is it possible to remove the trait allied general? and if its possible how can I do it??

Some traits can be removed by adding the inverse version of it, but I've no idea about Allied General.

addopt him to your family

he has been adopted and still the allied general trait remained, any ideas anyone??

If he conquers a settlement, he can become client ruler of that province.

not now that he´s been adopted

just consider it his nickname