Fields don't show while editing/create News

ext_tables.php

$tempColumns = array (
	"is_operation" => array (		
		"exclude" => 0,		
		"label" => "Ist Einsatz?",		
		"config" => Array (
			"type" => "check",
		)
	),
	"participating_vehicles" => array (		
		"exclude" => 0,		
		"label" => "Beteiligte Fahrzeuge",		
		"config" => Array (
			"type" => "select",	
			// "internal_type" => "db",
			// "items" => array(
				// array("",0),
			// ),
			"foreign_table" => "tx_y7fahrzeugdatenbank_domain_model_fahrzeug",
			"foreign_table_where" => "ORDER BY tx_y7fahrzeugdatenbank_domain_model_fahrzeug.name",
			// "allowed" => "tx_y7fahrzeugdatenbank_domain_model_fahrzeug",
			// "itemsProcFunc" => 'y7_fahrzeugdatenbank\\Classes\\Controller\\FahrzeugController->listAction',
			"size" => 99,	
			"minitems" => 0,
			//"maxitems" => 1,	
			// "MM" => "tx_y7fahrzeugdatenbank_domain_model_fznewsrel",
		)
	),
);
// debug($tempColumns);
$logger->info("tempColumns: ",$tempColumns);

\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns("tt_news",$tempColumns,1);


\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addToAllTCAtypes("tt_news",
	"is_operation;;;;1-1-1",'','after:short'
);
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addToAllTCAtypes("tt_news",
	"participating_vehicles;;;;2-2-2",'','after:short'
);

I added:
"maxitems" => 9999,

and changed size to 15.

But it doesn't save in the right way.