diff --git a/src/packing_lists.php b/src/packing_lists.php
index f24a999..94a8e5d 100644
--- a/src/packing_lists.php
+++ b/src/packing_lists.php
@@ -15,6 +15,14 @@ require_once 'db_connect.php';
 require_once 'header.php';
 
 $current_user_id = $_SESSION['user_id'];
+
+// AUTO-MIGRATION: Check columns to prevent SQL errors
+$check_col = $conn->query("SHOW COLUMNS FROM packing_lists LIKE 'is_template'");
+if ($check_col && $check_col->num_rows == 0) {
+    // Add column if missing
+    $conn->query("ALTER TABLE packing_lists ADD COLUMN is_template TINYINT(1) NOT NULL DEFAULT 0 AFTER share_token");
+}
+
 $view = isset($_GET['view']) && $_GET['view'] === 'templates' ? 'templates' : 'lists';
 $is_template_view = ($view === 'templates');