Core/Quests: Set quest slot earlier when abandoning a quest

src/server/game/Handlers/QuestHandler.cpp

@@ -443,6 +443,7 @@ void WorldSession::HandleQuestLogRemoveQuest(WorldPackets::Quest::QuestLogRemove
                 }
             }
 
+            _player->SetQuestSlot(packet.Entry, 0);
             _player->TakeQuestSourceItem(questId, true); // remove quest src item from player
             _player->AbandonQuest(questId); // remove all quest items player received before abandoning quest. Note, this does not remove normal drop items that happen to be quest requirements.
             _player->RemoveActiveQuest(questId);
@@ -464,8 +465,6 @@ void WorldSession::HandleQuestLogRemoveQuest(WorldPackets::Quest::QuestLogRemove
             sScriptMgr->OnQuestStatusChange(_player, questId);
         }
 
-        _player->SetQuestSlot(packet.Entry, 0);
-
         _player->UpdateAchievementCriteria(ACHIEVEMENT_CRITERIA_TYPE_QUEST_ABANDONED, 1);
     }
 }