Hi Rens, That did it. Thank you very much! -- Attila Monday, April 26, 2010, 8:52:25 PM, you wrote: RA> Hi Attila, RA> Just create the column in ext_tables.sql, and the error is gone. This is the RA> way 1 - n relations are stored in TYPO3. RA> Greetz, RA> Rens