[TYPO3-mvc] updateAction throw an exception

[Franz Koch]

Hey Daniel,

> The form in FE is correctly filled with the Data from the database, so I
> think there is no typo. The storagePid and newRecordStoragePid are also
> given.

where have you set the storagePid? 
plugin.tx_extkey.persistence.storagePid or some other place? If some 
other place, please give the mentioned one a try. Besides of that I'm 
currently out of ideas.

-- 
kind regards,
Franz Koch