Choose  Maintenance plans Change .

You reach the initial screen for changing maintenance plans.

Enter the number of the maintenance plan you want to change and choose .

You reach the maintenance plan screen.

Select the tabstrip Item object list and delete the objects from the object list using .

Select the tabstrip Item and delete the data entered in the section Reference object .

Choose  Extras Settings Reference object view.

You reach a dialog box in which the system indicates the object change.

Choose .

You reach a dialog box in which you can select a new reference object.

Select a reference object and choose .

The system adjusts the section Reference object accordingly.

Check whether the item data is also still valid for the new reference object and save it.