.

backend/config/database.php

@@ -39,7 +39,11 @@ function migrate($db) {
         created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
     )");
     try {
-        $db->exec("ALTER TABLE network_nodes ADD COLUMN notes TEXT DEFAULT ''");
+        $db->exec("CREATE TABLE IF NOT EXISTS node_notes (
+            node_id INT PRIMARY KEY,
+            notes TEXT DEFAULT '',
+            FOREIGN KEY (node_id) REFERENCES network_nodes(id) ON DELETE CASCADE
+        )");
     } catch (Exception $e) {
     }
 }