Error: a marker with the ID 0 does not exist!<br/><a href="https://www.mapsmarker.com" target="_blank" title="Go to plugin website"><img style="border:1px solid #ccc;" src="https://www.ashtrom-germany.com/wp-content/plugins/leaflet-maps-marker-pro/inc/img/map-deleted-image.png"></a><br/>