fix(Core/Quest): Throw error if quest_template RewardItemId is not se… (#17924)

fix(Core/Quest): Throw error if quest_template RewardItemId is not set in order

* closes https://github.com/azerothcore/azerothcore-wotlk/issues/17740

src/server/game/Globals/ObjectMgr.cpp

@@ -4942,6 +4942,25 @@ void ObjectMgr::LoadQuests()
             }
         }
 
+        for (uint8 j = 0; j < QUEST_REWARDS_COUNT; ++j)
+        {
+            if (!qinfo->RewardItemId[0] && qinfo->RewardItemId[j])
+            {
+                LOG_ERROR("sql.sql", "Quest {} has no `RewardItemId1` but has `RewardItem{}`. Reward item will not be loaded.",
+                                    qinfo->GetQuestId(), j + 1);
+            }
+            if (!qinfo->RewardItemId[1] && j > 1 && qinfo->RewardItemId[j])
+            {
+                LOG_ERROR("sql.sql", "Quest {} has no `RewardItemId2` but has `RewardItem{}`. Reward item will not be loaded.",
+                                    qinfo->GetQuestId(), j + 1);
+            }
+            if (!qinfo->RewardItemId[2] && j > 2 && qinfo->RewardItemId[j])
+            {
+                LOG_ERROR("sql.sql", "Quest {} has no `RewardItemId3` but has `RewardItem{}`. Reward item will not be loaded.",
+                                    qinfo->GetQuestId(), j + 1);
+            }
+        }
+
         for (uint8 j = 0; j < QUEST_REWARDS_COUNT; ++j)
         {
             uint32 id = qinfo->RewardItemId[j];