diff --git a/src/AssociationRegistry.Admin.ProjectionHost/Projections/Search/ElasticRepository.cs b/src/AssociationRegistry.Admin.ProjectionHost/Projections/Search/ElasticRepository.cs
index d5f730b84..ff4330b71 100644
--- a/src/AssociationRegistry.Admin.ProjectionHost/Projections/Search/ElasticRepository.cs
+++ b/src/AssociationRegistry.Admin.ProjectionHost/Projections/Search/ElasticRepository.cs
@@ -81,7 +81,9 @@ public async Task AppendLocatie<T>(string id, ILocatie locatie) where T : class
             id,
             selector: u => u.Script(
                 s => s
-                    .Source("ctx._source.locaties.add(params.item)")
+                    .Source("if(! ctx._source.locaties.contains(params.item)){" +
+                            "ctx._source.locaties.add(params.item)" +
+                            "}")
                     .Params(objects => objects.Add(key: "item", locatie))));
 
         if (!response.IsValid)