Drawn objects get saved multiple times

[SimpsonsWorld]

I tried to make a save-function to save the drawn items in a geojson. It just works but it always stores the items multiple times.
This is my function:

function saveToDb() {
  localStorage.clear();
  var allLayers = new L.featureGroup();
  map.eachLayer(function (layer) {
    if (layer instanceof L.Path) {
      allLayers.addLayer(layer);
    } else {
      if (layer instanceof L.Marker) {
        allLayers.addLayer(layer);
      }
    }
  });
  var geojson = allLayers.toGeoJSON();
  localStorage.setItem("data", JSON.stringify(geojson));
}

I would be very thankful if you could help me with this problem.

[Falke-Design]

The code looks good. Maybe the problem is while loading the layers from the LocalStorage?
Also I suggest you to use removeItem instead of localStorage.clear().

To make it a little bit easier you can use map.pm.getGeomanLayers(true) to get all the Layers on the map, which can be modified by Geoman:

localStorage.removeItem("data");
var geojson = map.pm.getGeomanLayers(true).toGeoJSON();
localStorage.setItem("data", JSON.stringify(geojson));

[SimpsonsWorld]

I just found out that just after clicking on the save button the Local Storage looks quite good - every Item is only saved once. But when I am refreshing the site, the multiple items show up. Any idea where this problem can be located?

[Falke-Design]

Pretty hard to say without the code

[SimpsonsWorld]

I'm sorry, I am new here. So I hope it's okay if I share my could like this.
Karte.txt

[Falke-Design]

You are executing this 4 times:

 var data = localStorage.getItem('data');
      if(data){
         var geoLayer = L.geoJSON(JSON.parse(data)).addTo(map);
      } 

This added the same layers multiple times

[SimpsonsWorld]

Thank you so much! Don't know why I haven't seen it.
Can you also help me with the saving of the properties (like color, text,...). I saw many had the same problem here that the properties don't get saved but I didn't really found a solution.