try to get it work

admin/src/Table/DepotTable.php

@@ -0,0 +1,24 @@
+<?php
+/**
+ * @package		Depot.Administrator
+ * @subpackage	com_depot
+ * @author		Thomas Kuschel <thomas@kuschel.at>
+ * @copyright	(C) 2023 KW4NZ, <https://www.kuschel.at>
+ * @license		GNU General Public License version 2 or later; see LICENSE.md
+ * @since		0.0.2
+ */
+
+namespace KW4NZ\Component\Depot\Administrator\Table;
+
+use Joomla\CMS\Table\Table;
+use Joomla\Database\DatabaseDriver;
+
+\defined('_JEXEC') or die;
+
+class DepotTable extends Table
+{
+	function __construct(DatabaseDriver $db)
+	{
+		parent::__construct('#__depot', 'id', $db);
+	}
+}

admin/src/Table/PartTable.php

@@ -21,4 +21,4 @@ class PartTable extends Table
 	{
 		parent::__construct('#__depot', 'id', $db);
 	}
-}
+}