**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.


prod2move_ids[move.product_id.id].append({'move': move, 'remaining_qty': move.product_qty})
        need_rereserve = False
        
        operations = picking.pack_operation_ids
        operations = sorted(operations, key=lambda x: ((x.package_id and not x.product_id) and -4 or 0) + (x.package_id and -2 or 0) + (x.lot_id and -1 or 0))
        
        links = link_obj.search(cr, uid, [('operation_id', 'in', [x.id for x in operations])], context=context)
        if links:
            link_obj.unlink(cr, uid, links, context=context)
        
        for ops in operations:
            
            
            if ops.package_id and not ops.product_id:
                
                quant_ids = package_obj.get_content(cr, uid, [ops.package_id.id], context=context)
                for quant in quant_obj.browse(cr, uid, quant_ids, context=context):
                    remaining_qty_on_quant = quant.qty
                    if quant.reservation_id:
                        
                        quants_in_package_done.add(quant.id)
                        qty_on_link = _create_link_for_quant(ops.id, quant, quant.qty)
                        remaining_qty_on_quant -= qty_on_link
                    if remaining_qty_on_quant:
                        still_to_do.append((ops, quant.product_id.id, remaining_qty_on_quant))
                        need_rereserve = True
            elif ops.product_id.id:
                
                qty_to_assign = uom_obj._compute_qty_obj(cr, uid, ops.product_uom_id, ops.product_qty, ops.product_id.uom_id, context=context)
                precision_rounding = ops.product_id.uom_id.rounding