[Solved] CSRF CI3 Question

I have a question about CSRF on Codeigniter 3

When I submit any of my forms and get a error on form if I refresh page or reload page it then throws codeigniter error

Code:

The action you have requested is not allowed.

Why does that happen only when reload or refresh.

PHP Code:

$config['cookie_prefix']    = '';

$config['cookie_domain']    = '';
$config['cookie_path']        = '/';
$config['cookie_secure']    = FALSE;
$config['cookie_httponly']     = FALSE;


$config['global_xss_filtering'] = TRUE;

$config['csrf_protection'] = TRUE;
$config['csrf_token_name'] = 'csrf_test_name';
$config['csrf_cookie_name'] = 'csrf_cookie_name';
$config['csrf_expire'] = 7200;
$config['csrf_regenerate'] = TRUE;
$config['csrf_exclude_uris'] = array(); 


Any Suggestions?

There's only one rule - please don't tell anyone to go and read the manual.  Sometimes the manual just SUCKS!