I've got a notice (from this great great plugin)! :-)

I used a php script to standardize a group I previously entered manually using the simple fields form to create it. When I used the php script to automatically create the same group in another website, on the front end I’ve got this notice: “Notice: Undefined index: deleted in /var/www/vhosts/***my-domain***/***my-folder***/wp-content/plugins/simple-fields/simple_fields.php on line 3262.

This is the script I used to create the dropdown entry:

array(
				'slug' => "image_prop",
				'name' => 'Image dimensions',
				'description' => 'Width and Height standardized dimensions',
				'type' => 'dropdown',
				'type_dropdown_options' => array(
					"enable_multiple" => 0,
					"enable_extended_return_values" => 1,
					array("value" => '1:1'),
					array("value" => '4:3'),
					array("value" => '16:9'),
					array("value" => '19:10'),
					array("value" => '2:1')
				)

https://www.ads-software.com/extend/plugins/simple-fields/