And migration script

application/migrations/141_alter_user_options_table.php

@@ -0,0 +1,13 @@
+<?php
+
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+class Migration_alter_user_options_table extends CI_Migration {
+
+	public function up() {
+		$this->db->query("ALTER TABLE user_options CHANGE COLUMN option_value option_value text DEFAULT NULL;");
+	}
+
+	public function down(){
+	}
+}