After you have set the conversion indicator for a planned order, or performed an ATP check, the planned order contains the current substitute components and the product substitution orders are no longer required.
After an ATP check, the system reduces or deletes the product substitution orders. It does not do so immediately, however, but in the next planning run.
After the conversion indicator is set, the system immediately reduces or deletes the product substitution orders, provided that the system does not execute an ATP check as a conversion check during the conversion.