TYPO3 Exception 1439288036


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An item in field “…” of table “…” is not an array as expected

This happens in TYPO3 7.6 if there is a incompatible ‘items’ TCA definition in the according field like

'items' => [
    '0' => '-'


'items' => ['-']

This has to be replaced with a correct item definition like

'items' => [
    ['-', 0]