[TYPO3-mvc] Problem with persistence of object by multi step form

[Stefan Kruse]

Hi, 

i have a multi step form. All objects created during the form steps are saved serialized in the session. And at the last step i save it to the repository.

But, how can i prevent double savings. Every time i reload the page the objects are saved again. 

$object->_isNew() or $object->_getUid() doesnt help me.

Has anybody an idea how to solve this problem?

Thanks a lot
Stefan