You have to either set the column to string (as TYPO3 is trying to store the list of areas as a comma separated list of UIDs) or use a "join" table (see "MM" attribute in 1). Tomas Mrozek -- [1] - http://typo3.org/documentation/document-library/core-documentation/doc_core_api/4.2.0/view/4/2/#id4272080