Relation Sitemap <> REST

Dear all

I actually got an issue while playing with own sitemap and demo.sitemap. I would like to write my own UI using REST client in PHP which at the moment seems to be working.
However today I started to change the way of sitemap setup and followed the idea of Holger Hees sitemap example

sitemap Aarau label="Townhouse" { Frame label="Status" { Group item=Lights label="Licht" { } } Frame label="Steuern" { Group label="Licht" { } } }

Haveing applied this I see Items which are not related to my sitemap or config at all.
Basic UI shows like:

The rest array shows like:

Array
(
    [0] => stdClass Object
        (
            [widgetId] => Aarau_0
            [type] => Frame
            [label] => Status
            [icon] => frame
            [mappings] => Array
                (
                )
            [widgets] => Array
                (
                    [0] => stdClass Object
                        (
                            [widgetId] => Aarau_0_0
                            [type] => Group
                            [label] => Licht [(3)]
                            [icon] => group
                            [mappings] => Array
                                (
                                )
                            [item] => stdClass Object
                                (
                                    [members] => Array
                                        (
                                        )
                                    [groupType] => Switch
                                    [link] => http://localhost:8080/rest/items/Lights
                                    [state] => ON
                                    [stateDescription] => stdClass Object
                                        (
                                            [pattern] => (%d)
                                            [readOnly] => 
                                            [options] => Array
                                                (
                                                )
                                        )
                                    [type] => GroupItem
                                    [name] => Lights
                                    [label] => All Lights
                                    [tags] => Array
                                        (
                                        )
                                    [groupNames] => Array
                                        (
                                        )
                                )
                            [linkedPage] => stdClass Object
                                (
                                    [id] => 0000
                                    [title] => Licht [(3)]
                                    [icon] => group
                                    [link] => http://localhost:8080/rest/sitemaps/Home/0000
                                    [leaf] => 1
                                )
                            [widgets] => Array
                                (
                                )
                        )
                )
        )
)

I asume it comes from the demo.sitemap.

But how do I clean those ones out now? Do I need to send a REST delete request to each of them?

Kind regards
Stefan

Greetings from newbie…

I for sure forgot to delete the demo.items…