diff --git a/inc/woocommerce.php b/inc/woocommerce.php
index 81f53f03..81d200ae 100644
--- a/inc/woocommerce.php
+++ b/inc/woocommerce.php
@@ -230,6 +230,10 @@ function ppom_check_validation( $product_id, $post_data, $passed = true ) {
 
 		$passed = apply_filters( 'ppom_before_fields_validation', $passed, $field, $post_data, $product_id );
 
+		if ( $passed && ( ! isset( $field['required'] ) || 'on' !== $field['required'] ) ) {
+			continue;
+		}
+
 		if (
 			empty( $field['data_name'] ) &&
 			empty( $field['required'] ) &&