**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.


addons/stock/stock.py
'''Get the remaining quantities per product on an operation with a package. This function returns a dictionary'''
        
        if not operation.package_id or operation.product_id:
            return {operation.product_id.id: operation.remaining_qty}
        
        res = self.pool.get('stock.quant.package')._get_all_products_quantities(cr, uid, operation.package_id.id, context=context)
        
        for record in operation.linked_move_operation_ids:
            if record.move_id.product_id.id not in res:
                res[record.move_id.product_id.id] = 0
            res[record.move_id.product_id.id] -= record.qty
        return res
    def _get_remaining_qty(self, cr, uid, ids, name, args, context=None):
        uom_obj = self.pool.get('product.uom')
        res = {}
        for ops in self.browse(cr, uid, ids, context=context):
            res[ops.id] = 0
            if ops.package_id and not ops.product_id:
                
                
                continue
            else:
                qty = ops.product_qty
                if ops.product_uom_id:
                    qty = uom_obj._compute_qty_obj(cr, uid, ops.product_uom_id, ops.product_qty, ops.product_id.uom_id, context=context)
                for record in ops.linked_move_operation_ids:
                    qty -= record.qty
                res[ops.id] = float_round(qty, precision_rounding=ops.product_id.uom_id.rounding)
        return res
    def product_id_change(self, cr, uid, ids, product_id, product_uom_id, product_qty, context=None):