**Impacted versions:** 8.0

**Steps to reproduce:**
To reproduce it is necessary the fifo configuration in the assignation of quants in moves.

- Create a sale order with two lines of the same product, one of that line with a route that generate moves between warehouse.

<img width="1231" alt="skitch 65" src="https://cloud.githubusercontent.com/assets/11341058/24102907/d575a638-0d53-11e7-922e-a3f034d43e94.png">

The route used has three pull rules:

1. From Stock Warehouse_1 to Virtual Locations/Inter Company Transit
2. From Virtual Locations/Inter Company Transit to Stock Warehouse_2
3. From Stock Warehouse_2 to Customers

<img width="1224" alt="skitch 66" src="https://cloud.githubusercontent.com/assets/11341058/24103147/b7c2bfbc-0d54-11e7-955c-87247a10e0bd.png">

- Confirm the sale order. It must be created three pickings:

<img width="1226" alt="skitch 67" src="https://cloud.githubusercontent.com/assets/11341058/24103498/d90c9b38-0d55-11e7-97ff-f986df8cdd9b.png">

- Transfer first two pickings.

<img width="1230" alt="skitch 70" src="https://cloud.githubusercontent.com/assets/11341058/24104496/b7b0be8a-0d58-11e7-89a2-4331fceec1d8.png">

- Before transfer third picking, review that one move has reserved the quant correctly because was reserved from the previous pickings.

<img width="1215" alt="skitch 68" src="https://cloud.githubusercontent.com/assets/11341058/24103908/23952cc8-0d57-11e7-9346-bd48d7edb54a.png">

**Current behavior:**

When check availability of this third picking, the quant already reserved is moved to the other move.

<img width="1264" alt="skitch 69" src="https://cloud.githubusercontent.com/assets/11341058/24104056/8be11616-0d57-11e7-8763-a90507315b19.png">
 
**Expected behavior:**

When check availability of this third picking, the moves already reserved must not be altered.


if ops.product_id:
                    
                    quant_dest_package_id  = ops.result_package_id.id
                    ctx = context
                else:
                    
                    quant_dest_package_id = False
                    ctx = context.copy()
                    ctx['entire_pack'] = True
                quant_obj.quants_move(cr, uid, quants, move, ops.location_dest_id, location_from=ops.location_id, lot_id=ops.lot_id.id, owner_id=ops.owner_id.id, src_package_id=ops.package_id.id, dest_package_id=quant_dest_package_id, context=ctx)
                
                if not ops.product_id and ops.package_id and ops.result_package_id.id != ops.package_id.parent_id.id:
                    self.pool.get('stock.quant.package').write(cr, SUPERUSER_ID, [ops.package_id.id], {'parent_id': ops.result_package_id.id}, context=context)
                if not move_qty.get(move.id):
                    raise osv.except_osv(_("Error"), _("The roundings of your Unit of Measures %s on the move vs. %s on the product don't allow to do these operations or you are not transferring the picking at once. ") % (move.product_uom.name, move.product_id.uom_id.name))
                move_qty[move.id] -= record.qty
        
        move_dest_ids = set()
        for move in self.browse(cr, uid, ids, context=context):
            move_qty_cmp = float_compare(move_qty[move.id], 0, precision_rounding=move.product_id.uom_id.rounding)
            if move_qty_cmp > 0:  
                main_domain = [('qty', '>', 0)]
                prefered_domain = [('reservation_id', '=', move.id)]
                fallback_domain = [('reservation_id', '=', False)]
                fallback_domain2 = ['&', ('reservation_id', '!=', move.id), ('reservation_id', '!=', False)]
                prefered_domain_list = [prefered_domain] + [fallback_domain] + [fallback_domain2]
                self.check_tracking(cr, uid, move, move.restrict_lot_id.id, context=context)
                qty = move_qty[move.id]
                quants = quant_obj.quants_get_prefered_domain(cr, uid, move.location_id, move.product_id, qty, domain=main_domain, prefered_domain_list=prefered_domain_list, restrict_lot_id=move.restrict_lot_id.id, restrict_partner_id=move.restrict_partner_id.id, context=context)
                quant_obj.quants_move(cr, uid, quants, move, move.location_dest_id, lot_id=move.restrict_lot_id.id, owner_id=move.restrict_partner_id.id, context=context)