**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.


"""Assign a picking on the given move_ids, which is a list of move supposed to share the same procurement_group, location_from and location_to
        (and company). Those attributes are also given as parameters.
        """
        pick_obj = self.pool.get("stock.picking")
        
        
        query = """
            SELECT stock_picking.id FROM stock_picking, stock_move
            WHERE
                stock_picking.state in ('draft', 'confirmed', 'waiting') AND
                stock_move.picking_id = stock_picking.id AND
                stock_move.location_id = %s AND
                stock_move.location_dest_id = %s AND
        """
        params = (location_from, location_to)
        if not procurement_group:
            query += "stock_picking.group_id IS NULL LIMIT 1"
        else:
            query += "stock_picking.group_id = %s LIMIT 1"
            params += (procurement_group,)
        cr.execute(query, params)
        [pick] = cr.fetchone() or [None]
        if not pick:
            move = self.browse(cr, uid, move_ids, context=context)[0]
            values = self._prepare_picking_assign(cr, uid, move, context=context)
            pick = pick_obj.create(cr, uid, values, context=context)
        return self.write(cr, uid, move_ids, {'picking_id': pick}, context=context)
    def onchange_date(self, cr, uid, ids, date, date_expected, context=None):