Sacred Haven of Debauchery

That’s the situation. I seem to have completed the quest, but the entry didn’t appear in the diary. The website says that in BG Trilogy, Coran wants to kill a special wyvern, but the developers forgot to add it to the map (and this isn’t the only similar bug =\). But I have BG2, and that’s a shame. It also says that if you don’t complete the quest, the character might leave, but I essentially did complete the quest and partially finished it, since I sold one of the wyvern heads to the client. I don’t know what will happen now. I hope he doesn’t leave.