Due to the added material, two new supermarket areas will be needed in the warehouse.
To create them, go back to the Layout-Editor.
The areas are to be named "Supermarkt_19" and "Supermarkt_20".
You can see the dimensions for this area in the following screenshot. The areas are to be placed next to the "Supermarkt_18" area.
To edit or delete a surface afterwards, activate "Layout movable" and then select the respective area.
Save your progress with the button in the upper right corner of the screen.