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] ]