diff --git a/db.js b/db.js
index fdcf17b..73452fa 100644
--- a/db.js
+++ b/db.js
@@ -36,7 +36,6 @@ SELECT
 , sydat as sydat
 , datlv as datlv
 , fibuk as fibuk
-, kunde.ku_id as ku_id
 , RTRIM(bsper) as bsper
 , RTRIM(baktiv) as baktiv
 FROM kunde
diff --git a/public/index.html b/public/index.html
index 313301b..e2a3989 100644
--- a/public/index.html
+++ b/public/index.html
@@ -34,7 +34,6 @@
                     <button type="button" class="field-toggle" data-field="sydat" aria-pressed="false">Erstellt am</button>
                     <button type="button" class="field-toggle" data-field="datlv" aria-pressed="false">Letzte Änderung</button>
                     <button type="button" class="field-toggle" data-field="fibuk" aria-pressed="false">Fibu-Konto</button>
-                    <button type="button" class="field-toggle" data-field="ku_id" aria-pressed="false">Kunden-ID (intern)</button>
                 </div>
                 <label class="checkbox-row">
                     <input type="checkbox" id="applyExtraValues">
diff --git a/server.js b/server.js
index 2b3f79e..a03d01a 100644
--- a/server.js
+++ b/server.js
@@ -25,7 +25,7 @@ let customers = [];
 let customersByNumber = new Map();
 
 // Felder, die zusätzlich zu Nummer/Name über die erweiterte Suche durchsucht werden können
-const ADVANCED_SEARCH_FIELDS = ["kugru", "kg_id", "sydat", "datlv", "fibuk", "ku_id"];
+const ADVANCED_SEARCH_FIELDS = ["kugru", "kg_id", "sydat", "datlv", "fibuk"];
 
 function applyCustomers(rows) {
     customers = rows
@@ -38,7 +38,6 @@ function applyCustomers(rows) {
             sydat: row.sydat,
             datlv: row.datlv,
             fibuk: row.fibuk,
-            ku_id: row.ku_id,
         }))
         .filter((customer) => customer.number !== "" && customer.name !== "");
     customersByNumber = new Map(customers.map((customer) => [customer.number, customer]));