[TASK] Fix wrong default value for company contacts

Configuration/TCA/tx_sgjobs_domain_model_company.php

@@ -190,7 +190,7 @@ return [
 			'label' => 'LLL:EXT:sg_jobs/Resources/Private/Language/locallang_db.xlf:tx_sgjobs_domain_model_job.contact',
 			'config' => [
 				'type' => 'select',
-				'eval' => 'required',
+				'items' => [['', 0]],
 				'renderType' => 'selectSingle',
 				'internal_type' => 'db',
 				'foreign_table' => 'tx_sgjobs_domain_model_contact',