Duplicate bookmarks in Google Maps, even with cache disabled!

Question

Hello, I’m working with google maps, everything was going ok, but when I started using the markers, the same are getting duplicated in some locations, this happens when I’m walking and stand somewhere, when I move again and the GPS updates my position, in the place where I stood there is a marked, as if it were a cache, but the way I’m handling the bookmarks wasn’t supposed to happen, I’ve disabled the page cache and nothing, if it has ever happened to anyone or if anyone has any tips I will be very grateful, thank you for the attention, I’ll be putting the code I used to disable the browser cache and how I’m updating the bookmarks on the map.

Meta tags to disable cache

Removes all bookmarks to update them, I did it to see if it would stop duplicating

$.each(markers, function(index, marker) {
    marker.setMap(null);
});

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This variable is created at the beginning of the script

var markers = [];

here is the content of a function that keeps giving get with the device information ()

if (markers[device.id] == undefined) {
    markers[device.id] = new google.maps.Marker({
        position: { lat: device.lat, lng: device.lng },
        map: map,
        title: device.name
    });
} else {
    markers[device.id].setPosition( { lat: device.lat, lng: device.lng } );
}