Any position which has been inserted in a BOM and then deleted with the same change number, is no longer active or visible, but still existing. Certain material master changes may not be allowed, because the material is still used in the BOM. For example when changing the basic material unit, changing the material type or deleting the material.
This function will search these positions and delete the position on request.
The function is protected by authorization. See Customizing Manual ADM | ProAdmin | Customizing Manual