Plans that have been created more than once and are outdated must be deleted (click on the respective plan and then on the “Delete plan” button below) so that only the most recent plan is available in the list view. This plan must then be updated and must not be created again in the event of changes. Make sure that the field for the plan number does not contain an index or date (can be changed by right-clicking on the plan), as the number remains unchanged for all further plan indexes.