**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.


context = dict(context or {}, active_ids=ids)
        return self.pool.get("report").get_action(cr, uid, ids, 'stock.report_package_barcode_small', context=context)
    
    def unpack(self, cr, uid, ids, context=None):
        quant_obj = self.pool.get('stock.quant')
        for package in self.browse(cr, uid, ids, context=context):
            quant_ids = [quant.id for quant in package.quant_ids]
            quant_obj.write(cr, SUPERUSER_ID, quant_ids, {'package_id': package.parent_id.id or False}, context=context)
            children_package_ids = [child_package.id for child_package in package.children_ids]
            self.write(cr, uid, children_package_ids, {'parent_id': package.parent_id.id or False}, context=context)
        return self.pool.get('ir.actions.act_window').for_xml_id(cr, uid, 'stock', 'action_package_view', context=context)
    def get_content(self, cr, uid, ids, context=None):
        child_package_ids = self.search(cr, uid, [('id', 'child_of', ids)], context=context)
        return self.pool.get('stock.quant').search(cr, uid, [('package_id', 'in', child_package_ids)], context=context)
    def get_content_package(self, cr, uid, ids, context=None):
        quants_ids = self.get_content(cr, uid, ids, context=context)
        res = self.pool.get('ir.actions.act_window').for_xml_id(cr, uid, 'stock', 'quantsact', context=context)
        res['domain'] = [('id', 'in', quants_ids)]
        return res
    def _get_product_total_qty(self, cr, uid, package_record, product_id, context=None):
        ''' find the total of given product 'product_id' inside the given package 'package_id'''
        quant_obj = self.pool.get('stock.quant')
        all_quant_ids = self.get_content(cr, uid, [package_record.id], context=context)
        total = 0
        for quant in quant_obj.browse(cr, uid, all_quant_ids, context=context):
            if quant.product_id.id == product_id:
                total += quant.qty
        return total
    def _get_all_products_quantities(self, cr, uid, package_id, context=None):