diff --git a/src/main/java/me/zinch/validator/Validators.java b/src/main/java/me/zinch/validator/Validators.java
index ffb9a1a..beb3a10 100644
--- a/src/main/java/me/zinch/validator/Validators.java
+++ b/src/main/java/me/zinch/validator/Validators.java
@@ -7,6 +7,7 @@ import me.zinch.models.Product;
 import org.hibernate.validator.HibernateValidator;
 
 import java.util.List;
+import java.util.Objects;
 import java.util.Set;
 
 /**
@@ -30,11 +31,12 @@ public class Validators {
 
   public static List<ValidateResult<Product>> validateProductList(List<Product> db) {
     var ids = db.stream().map(Product::getId).toList();
-    var partNumbers = db.stream().map(Product::getPartNumber).toList();
+    var partNumbers = db.stream().map(Product::getPartNumber).filter(Objects::nonNull).toList();
     var validations = new java.util.ArrayList<>(db.stream().map(Validators::validateObject).toList());
     if (ids.size() != Set.copyOf(ids).size()) {
       validations.add(new ValidateResult<>("Поле id должно быть уникальным"));
     }
+    var a = Set.copyOf(partNumbers);
     if (partNumbers.size() != Set.copyOf(partNumbers).size()) {
       validations.add(new ValidateResult<>("Поле partNumbers должно быть уникальным"));
     }