A line on a supplier schedule can sometimes cause a release exception, i.e. the line is trying to update a purchase order line which already is delivered to stock. Regardless of whether you wish to decrease or increase the quantity of the purchase order line, this must be resolved manually, perhaps after consulting your supplier. In order to release and convert the remaining schedule lines into purchase order lines, you can delete the schedule line with release exception. This is done by using the Operation menu choice Remove from Release.
The supplier schedule has failed during the flow and the schedule line exists with release exception.
As result of this removal, you can release and convert the remaining schedule lines into purchase order lines.