**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
propagated_date_field = 'date'
        if not context.get('do_not_propagate', False) and (propagated_date_field or propagated_changes_dict):
            
            for move in self.browse(cr, uid, ids, context=context):
                if move.move_dest_id and move.propagate:
                    if 'date_expected' in propagated_changes_dict:
                        propagated_changes_dict.pop('date_expected')
                    if propagated_date_field:
                        current_date = datetime.strptime(move.date_expected, DEFAULT_SERVER_DATETIME_FORMAT)
                        new_date = datetime.strptime(vals.get(propagated_date_field), DEFAULT_SERVER_DATETIME_FORMAT)
                        delta = new_date - current_date
                        if abs(delta.days) >= move.company_id.propagation_minimum_delta:
                            old_move_date = datetime.strptime(move.move_dest_id.date_expected, DEFAULT_SERVER_DATETIME_FORMAT)
                            new_move_date = (old_move_date + relativedelta.relativedelta(days=delta.days or 0)).strftime(DEFAULT_SERVER_DATETIME_FORMAT)
                            propagated_changes_dict['date_expected'] = new_move_date
                    
                    
                    if propagated_changes_dict:
                        self.write(cr, uid, [move.move_dest_id.id], propagated_changes_dict, context=context)
        track_pickings = not context.get('mail_notrack') and any(field in vals for field in ['state', 'picking_id', 'partially_available'])
        if track_pickings:
            to_track_picking_ids = set([move.picking_id.id for move in moves if move.picking_id])
            if vals.get('picking_id'):
                to_track_picking_ids.add(vals['picking_id'])
            to_track_picking_ids = list(to_track_picking_ids)
            pickings = picking_obj.browse(cr, uid, to_track_picking_ids, context=context)
            initial_values = dict((picking.id, {'state': picking.state}) for picking in pickings)
        res = super(stock_move, self).write(cr, uid, ids, vals, context=context)
        if track_pickings:
            picking_obj.message_track(cr, uid, to_track_picking_ids, picking_obj.fields_get(cr, uid, ['state'], context=context), initial_values, context=context)