hosting-import fail on site alias

[aegir@host ~]$ drush @hostmaster hosting-import @jktestcom
WD php: mysqli_real_escape_string() expects parameter 2 to be string, object given in
/var/aegir/hostmaster-6.x-1.0/includes/database.mysqli.inc on line 330.     [error]
mysqli_real_escape_string() expects parameter 2 to be string, object given in /var/aegir/hostmaster-6.x-1.0/includes/database.mysqli.inc
on line 330.     [warning]

[aegir@host ~]$ cat .drush/jktescom.alias.drushrc.php
<?php
$aliases['jktescom'] = array (
  'context_type' => 'site',
  'platform' => '@platform_jktestcom',
  'server' => '@server_master',
  'db_server' => '@server_localhost',
  'uri' => 'jktest.com',
  'root' => '/home/jail/./home/jktest/public_html',
  'site_path' => '/home/jail/./home/jktest/public_html/sites/jktest.com',
  'site_enabled' => true,
  'language' => 'en',
  'client_name' => 'my@email.com',
  'aliases' =>
  array (
  ),
  'redirection' => false,
  'profile' => 'default',
);
[aegir@hosting1 ~]$ cat .drush/platform_jktestcom.alias.drushrc.php
<?php
$aliases['platform_jktestcom'] = array (
  'context_type' => 'platform',
  'server' => '@server_master',
  'web_server' => '@server_master',
  'root' => '/home/jail/./home/jktest/public_html',
  'makefile' => '',
);