I want to remove one item from a ListView with GridView. After i removed the item from the GridView and reloading the GUI it still there.

<ListView Name="ListView_Panel" Margin="5,0,5,0" Grid.Row="1" ScrollViewer.HorizontalScrollBarVisibility="Visible">
    <ListView.View>
    <GridView>
            <GridViewColumn Width="Auto" Header="Path ID" DisplayMemberBinding="{Binding pathid}"/>
            <GridViewColumn Width="Auto" Header="file date" DisplayMemberBinding="{Binding filedate}"/>
            <GridViewColumn Width="Auto" Header="device" DisplayMemberBinding="{Binding device}"/>
            <GridViewColumn Width="Auto" Header="mean frequenzy [Hz]" DisplayMemberBinding="{Binding meanfreq}"/>
            <GridViewColumn Width="Auto" Header="data length" DisplayMemberBinding="{Binding datalength}"/>
    </GridView>
    </ListView.View>
    <ListView.ContextMenu>
    <ContextMenu>
            <MenuItem Header="Open NetCDF" Name="menuOption1"/>
            <MenuItem Header="Set Zoom" Name="menuOption2"/>
            <Separator/>
            <MenuItem Header="Exit" Name="menuExit"/>
    </ContextMenu>
    </ListView.ContextMenu>
</ListView>

This is my XML Part and here is how iam loading it:

$reader = (New-Object System.Xml.XmlNodeReader $xaml)
$sync.Window = [Windows.Markup.XamlReader]::Load( $reader )

#Importieren der Objekte
$xaml.SelectNodes("//*[@Name]") | ForEach-Object {
    try {
        Write-Output "Adding $($_.Name)"
        $sync.Add($_.Name, $sync.Window.FindName($_.Name))
    }
    catch {
        throw
    }
}

I want to remove the path id from the GridView. I tried to delete the GridViewColumn line and reloaded the gui but its still there and i dont understand why. I tried restarting my vscode my pc cause i was thinking there is a cache or something but i cant figure it out. Renaming the Listview worked but that isnt a thing for me.

Maybe someone knows.