**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
raise osv.except_osv(_('Operation Forbidden!'),
                        _('You cannot cancel a stock move that has been set to \'Done\'.'))
            if move.reserved_quant_ids:
                self.pool.get("stock.quant").quants_unreserve(cr, uid, move, context=context)
            if context.get('cancel_procurement'):
                if move.propagate:
                    procurement_ids = procurement_obj.search(cr, uid, [('move_dest_id', '=', move.id)], context=context)
                    procurement_obj.cancel(cr, uid, procurement_ids, context=context)
            else:
                if move.move_dest_id:
                    if move.propagate:
                        self.action_cancel(cr, uid, [move.move_dest_id.id], context=context)
                    elif move.move_dest_id.state == 'waiting':
                        
                        self.write(cr, uid, [move.move_dest_id.id], {'state': 'confirmed'}, context=context)
                if move.procurement_id:
                    
                    procs_to_check.add(move.procurement_id.id)
                    
        res = self.write(cr, uid, ids, {'state': 'cancel', 'move_dest_id': False}, context=context)
        if procs_to_check:
            procurement_obj.check(cr, uid, list(procs_to_check), context=context)
        return res
    def _check_package_from_moves(self, cr, uid, ids, context=None):
        pack_obj = self.pool.get("stock.quant.package")
        packs = set()
        for move in self.browse(cr, uid, ids, context=context):
            packs |= set([q.package_id for q in move.quant_ids if q.package_id and q.qty > 0])
        return pack_obj._check_location_constraint(cr, uid, list(packs), context=context)
    def find_move_ancestors(self, cr, uid, move, context=None):