Bodman Jaheira is cursed. How to solve this task?

When you go to the administrative district, in front of the government building, you will meet the mage hired by Proyere. The popularity of slave traders is really bad. You can spend some money to keep these wizards out of it, or even help you clean up that bastard. Of course, you can also refuse this mage's proposal. Then go to Tongguan Hotel in the slum, and the boss will give further clues. In an abandoned house on the roof of a slum, kill the slave owner, get his hair back, and take a few breaks to lift the curse.