How on earth did you manage that? Never mind. Unless you know how to safely edit saved games in Near Infinity your only option is to go back to a save prior to the fight, and keep it away from Joluv's area. Also do not use hostile area of effect spells.

Hmmm, maybe a "Charm" spell works, temporary? Idk he he will sell things in that state, though...

Thank you for your answers.
I had to reload an very old save but i dont have the problem anymore.
Maybe i killed an innocent inside the inn.

Unfortunately, in BG2 you can't talk to charmed characters (unless the EE changed that).

The only thing I can think of is friendly fire. Keep in mind that most AoE mage spells would also hit non hostile targets.