diff --git a/public/assets/js/ui-user.js b/public/assets/js/ui-user.js
index 03dfbe3..231249e 100644
--- a/public/assets/js/ui-user.js
+++ b/public/assets/js/ui-user.js
@@ -250,8 +250,10 @@ function fillSettingsForm(settings) {
   settingsForm.bridge_token.value = settings.bridge_token || '';
   settingsForm.sender_token.value = settings.sender_token || '';
   settingsForm.external_api_token.value = settings.external_api_token || '';
-  const tables = Array.isArray(settings.bridge_tables) ? settings.bridge_tables : [];
-  settingsForm.bridge_tables ? settingsForm.bridge_tables.value = tables.join(', ') : null;
+  const tables = normalizeTableNames(settings.bridge_tables);
+  if (settingsForm.bridge_tables) {
+    settingsForm.bridge_tables.value = tables.join(', ');
+  }
   applyBridgePreview(tables);
   state.rotate = { bridge: false, sender: false, external: false };
 }
@@ -343,7 +345,7 @@ function parseBridgeTablesInput() {
 }
 
 function applyBridgePreview(tables) {
-  state.bridgeTables = Array.isArray(tables) ? tables : [];
+  state.bridgeTables = normalizeTableNames(tables);
   if (!bridgePreview) return;
   if (!state.bridgeTables.length) {
     bridgePreview.innerHTML = '<span class="text-xs text-slate-500">Keine Einschränkung – alle Tabellen erlaubt.</span>';
@@ -366,7 +368,7 @@ async function validateBridgeSettings(ev) {
   try {
     const res = await apiAction('account.bridge.test', { method: 'POST', data });
     if (!res?.ok) throw new Error(res?.error || 'Prüfung fehlgeschlagen');
-    const tables = Array.isArray(res.tables) ? res.tables : [];
+    const tables = normalizeTableNames(res.tables);
     applyBridgePreview(tables);
     if (settingsForm.bridge_tables) {
       settingsForm.bridge_tables.value = tables.join(', ');
@@ -377,6 +379,28 @@ async function validateBridgeSettings(ev) {
   }
 }
 
+function normalizeTableNames(list) {
+  if (!Array.isArray(list)) return [];
+  const seen = new Set();
+  const result = [];
+  for (const entry of list) {
+    let name = '';
+    if (typeof entry === 'string') {
+      name = entry;
+    } else if (entry && typeof entry === 'object') {
+      name = entry.name || entry.table || entry.label || '';
+    }
+    if (typeof name === 'string') {
+      const trimmed = name.trim();
+      if (trimmed && !seen.has(trimmed)) {
+        seen.add(trimmed);
+        result.push(trimmed);
+      }
+    }
+  }
+  return result;
+}
+
 async function loadUsers() {
   try {
     const res = await apiAction('account.users.list', { method: 'GET' });
diff --git a/src/ApiKernel.php b/src/ApiKernel.php
index 6d82931..aaf34c6 100644
--- a/src/ApiKernel.php
+++ b/src/ApiKernel.php
@@ -2011,9 +2011,10 @@ class ApiKernel
     private function ensureCustomerSettingsTableExists(): void
     {
         $table = $this->customerSettingsTable();
-        if ($this->tableExists($table)) return;
-        try {
-            $sql = <<<SQL
+        $justCreated = false;
+        if (!$this->tableExists($table)) {
+            try {
+                $sql = <<<SQL
 CREATE TABLE IF NOT EXISTS `$table` (
   `customer_id` int(10) unsigned NOT NULL,
   `bridge_url` varchar(500) DEFAULT NULL,
@@ -2026,10 +2027,45 @@ CREATE TABLE IF NOT EXISTS `$table` (
   PRIMARY KEY (`customer_id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
 SQL;
-            $this->pdo->exec($sql);
-            $this->tableExistsCache[$table] = true;
+                $this->pdo->exec($sql);
+                $this->tableExistsCache[$table] = true;
+                $justCreated = true;
+            } catch (Throwable $e) {
+                $this->fail('Customer-Settings Tabelle fehlt und konnte nicht erstellt werden', $e->getMessage(), 500);
+            }
+        }
+
+        if ($justCreated) {
+            return;
+        }
+
+        $this->ensureCustomerSettingsColumns($table);
+    }
+
+    private function ensureCustomerSettingsColumns(string $table): void
+    {
+        try {
+            $columns = $this->tableColumns($table);
         } catch (Throwable $e) {
-            $this->fail('Customer-Settings Tabelle fehlt und konnte nicht erstellt werden', $e->getMessage(), 500);
+            $this->fail('Customer-Settings Tabelle konnte nicht gelesen werden', $e->getMessage(), 500);
+            return;
+        }
+
+        $missing = [];
+
+        if (!in_array('bridge_tables', $columns, true)) {
+            $missing[] = 'ADD COLUMN `bridge_tables` text DEFAULT NULL';
+        }
+
+        if (!$missing) {
+            return;
+        }
+
+        try {
+            $sql = 'ALTER TABLE `' . $table . '` ' . implode(', ', $missing);
+            $this->pdo->exec($sql);
+        } catch (Throwable $e) {
+            $this->fail('Customer-Settings Tabelle konnte nicht aktualisiert werden', $e->getMessage(), 500);
         }
     }