How to modify?

Please avoid this, if possible.

If it was really necessary, please limit your changes to a very few Lots (different Parts), using this page:
http://www.bricklink.com/retractOrderItem.asp

Well have to manually validate each modified Lot.
This process can’t be automatized and takes many clicks and time.

WARNING: we may prefer to cancel a whole Order than to have to validate too much changes.