diff --git a/Layout/default/ConstructionConsent/Index.php b/Layout/default/ConstructionConsent/Index.php
index 80e86754e..4e79018ab 100644
--- a/Layout/default/ConstructionConsent/Index.php
+++ b/Layout/default/ConstructionConsent/Index.php
@@ -58,7 +58,11 @@ $pagination_entity_name = "Zustimmungserklärungen";
                                 <option value="">Alle</option>
                                 <?php
                                 $networks = array_key_exists("project_id", $filter) && $filter["project_id"] ? ConstructionConsentNetwork::search(["constructionconsentproject_id" => $filter["project_id"]]) : ConstructionConsentNetwork::getAll();
-                                foreach($networks as $network): ?>
+                                $networkOptions = [];
+                                foreach($networks as $network):
+                                    if (array_key_exists($network->adb_netzgebiet_id, $networkOptions)) continue;
+                                    $networkOptions[$network->adb_netzgebiet_id] = $network;?>
+
                                     <option value="<?=$network->adb_netzgebiet_id?>" <?=(is_array($filter) && array_key_exists("network", $filter) && $network->adb_netzgebiet_id == $filter["network"]) ? "selected='selected'" : ""?>><?=$network->adb_netzgebiet->name?></option>
                                 <?php endforeach;
                                 ?>