diff --git a/core/src/mindustry/game/MapMarkers.java b/core/src/mindustry/game/MapMarkers.java
index 3afb6895ee..e9eb6c696c 100644
--- a/core/src/mindustry/game/MapMarkers.java
+++ b/core/src/mindustry/game/MapMarkers.java
@@ -20,6 +20,7 @@ public class MapMarkers implements Iterable<ObjectiveMarker>{
         var prev = map.put(id, marker);
         if(prev != null){
             all.set(prev.arrayIndex, marker);
+            marker.arrayIndex = prev.arrayIndex;
         }else{
             all.add(marker);
             marker.arrayIndex = all.size - 1;