[TYPO3-english] A refresh in the Backend creates a new record everytime

[christian ewigfrost]

I have, what i think is a minor problem, so hopefully this won't casue to much troble for anyone helping me:

In the Backend i want the user to create records of a specific Model. The form should change depending on a select list which is filled with record of another model. It technically works, i set it up with displayCond conditions and to make it refresh i use the line "$GLOBALS['TCA']['tx_icingaconfgen_domain_model_services']['ctrl']['requestUpdate'] = 'checktype';" in my ext_tables.php, but whenever i choose a option in the select list and i get the referesh notification ("This change will affect which fields are available in the form. Would you like to save now in order to refresh the display?") it creates a record upon clicking on OK. But that's obviously not what i want. Is there maybe another way to refresh?