TYPO3 Core

Most TCA column types have rendering types. There is - in most cases a default rendering type called. However when switching to this default type the the empty string '' has to be used while neither 'default' nor 'Default' is allowed. As the rendering type is also called "Default" in the official documentation I would suggest to introduce it and to accept both the empty string and the string 'default' for the default rendering type.

 'types' => [
        'withOverriddenColumns' => [
            'showitem' => 'record_type, title, color, text_1',
            'columnsOverrides' => [
                'color' => [
                    'config' => [
                        'renderType' => 'default',
                        'readOnly' => true,
                        'size' => 10,
                    ],
                ],
]

I would expect the output to be the same like

 'types' => [
        'withOverriddenColumns' => [
            'showitem' => 'record_type, title, color, text_1',
            'columnsOverrides' => [
                'color' => [
                    'config' => [
                        'renderType' => '',
                        'readOnly' => true,
                        'size' => 10,
                    ],
                ],
]

However this produces an error, see attached Screen