Field help (STODISFLG2) 

If activated, this indicator is used to control the level of available stock before launching the reorder, in order to avoid overstock situations. When this control is performed, a reorder request is made only for the products which are out of stock. Otherwise the reorder will be requested irrespective of stock being available or not.
SEEINFO  The control of the level of available stock is performed only in the case when the order line of the launched product has been "Assigned" or "Allocated".