diff --git a/Configuration/TCA/tx_sgjobs_domain_model_job.php b/Configuration/TCA/tx_sgjobs_domain_model_job.php
index 0b8dc7c0a4f12c2b694001f5ea8cba4f93adc2e7..8903c2ad564817a1fbc23f1aeb94e47e6c750421 100644
--- a/Configuration/TCA/tx_sgjobs_domain_model_job.php
+++ b/Configuration/TCA/tx_sgjobs_domain_model_job.php
@@ -133,7 +133,7 @@ return [
 			'config' => [
 				'type' => 'input',
 				'size' => 30,
-				'eval' => 'trim, required'
+				'eval' => 'trim, required, unique'
 			],
 		],
 		'job_id' => [