diff --git a/app/plugins/EnvSource/src/Model/Table/EnvSourcesTable.php b/app/plugins/EnvSource/src/Model/Table/EnvSourcesTable.php
index cdd8c2b5b..0b8871abc 100644
--- a/app/plugins/EnvSource/src/Model/Table/EnvSourcesTable.php
+++ b/app/plugins/EnvSource/src/Model/Table/EnvSourcesTable.php
@@ -31,7 +31,6 @@
 
 use Cake\ORM\Table;
 use Cake\Validation\Validator;
-use \EnvSource\Lib\Enum\EnvSourceDuplicateModeEnum;
 use \EnvSource\Lib\Enum\EnvSourceSpModeEnum;
 
 class EnvSourcesTable extends Table {
@@ -106,10 +105,6 @@ public function initialize(array $config): void {
         'type'      => 'type',
         'attribute' => 'PersonRoles.affiliation_type'
       ],
-      'duplicateModes' => [
-        'type' => 'enum',
-        'class' => 'EnvSource.EnvSourceDuplicateModeEnum'
-      ],
       'emailAddressTypes' => [
         'type' => 'type',
         'attribute' => 'EmailAddresses.type'