When importing main zones as shapefile, how can I allocate zones to these main zones?

- Create a POI category.
- Import the shapefile into this POI category.
- If more POIs exist, create a filter on this POI category.
- POIs -> (right-click to open the context menu) -> Convert active POIs ->
Dialog 'Convert Points of interest'
Convert Points of interest to: Main zones
Zones in polygon of main zone: Assign all zones
Delete Points of interest after completing the action: True