**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.


"""
        This can be used to provide a button that rereserves taking into account the existing pack operations
        """
        for pick in self.browse(cr, uid, ids, context=context):
            self.rereserve_quants(cr, uid, pick, move_ids = [x.id for x in pick.move_lines
                                                             if x.state not in ('done', 'cancel')], context=context)
    def rereserve_quants(self, cr, uid, picking, move_ids=[], context=None):
        """ Unreserve quants then try to reassign quants."""
        stock_move_obj = self.pool.get('stock.move')
        if not move_ids:
            self.do_unreserve(cr, uid, [picking.id], context=context)
            self.action_assign(cr, uid, [picking.id], context=context)
        else:
            stock_move_obj.do_unreserve(cr, uid, move_ids, context=context)
            stock_move_obj.action_assign(cr, uid, move_ids, context=context)
    @api.cr_uid_ids_context
    def do_enter_transfer_details(self, cr, uid, picking, context=None):
        if not context:
            context = {}
        else:
            context = context.copy()
        context.update({
            'active_model': self._name,
            'active_ids': picking,
            'active_id': len(picking) and picking[0] or False
        })
        created_id = self.pool['stock.transfer_details'].create(cr, uid, {'picking_id': len(picking) and picking[0] or False}, context)
        return self.pool['stock.transfer_details'].wizard_view(cr, uid, created_id, context)
    @api.cr_uid_ids_context
    def do_transfer(self, cr, uid, picking_ids, context=None):