Core/Players: Do not allow polearm to be equipped in the offhand.

Signed-off-by: Nay <dnpd.dd@gmail.com>

Closes #7709

src/server/game/Entities/Player/Player.cpp

@@ -11531,7 +11531,11 @@ InventoryResult Player::CanEquipItem(uint8 slot, uint16 &dest, Item* pItem, bool
 
             if (eslot == EQUIPMENT_SLOT_OFFHAND)
             {
-                if (type == INVTYPE_WEAPON || type == INVTYPE_WEAPONOFFHAND)
+                // Do not allow polearm to be equipped in the offhand (rare case for the only 1h polearm 41750)
+                if (pProto->SubClass == ITEM_SUBCLASS_WEAPON_POLEARM)
+                    return EQUIP_ERR_ITEM_DOESNT_GO_TO_SLOT;
+
+                else if (type == INVTYPE_WEAPON || type == INVTYPE_WEAPONOFFHAND)
                 {
                     if (!CanDualWield())
                         return EQUIP_ERR_CANT_DUAL_WIELD;