diff --git a/persistence-modules/spring-boot-persistence-mongodb-2/src/main/java/com/baeldung/boot/unique/field/dao/Customer2Repository.java b/persistence-modules/spring-boot-persistence-mongodb-2/src/main/java/com/baeldung/boot/unique/field/dao/Customer2Repository.java
deleted file mode 100644
index 6afe004609..0000000000
--- a/persistence-modules/spring-boot-persistence-mongodb-2/src/main/java/com/baeldung/boot/unique/field/dao/Customer2Repository.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package com.baeldung.boot.unique.field.dao;
-
-import org.springframework.data.mongodb.repository.MongoRepository;
-
-import com.baeldung.boot.unique.field.data.Customer2;
-
-public interface Customer2Repository extends MongoRepository<Customer2, Long> {
-}
diff --git a/persistence-modules/spring-boot-persistence-mongodb-2/src/main/java/com/baeldung/boot/unique/field/data/Customer2.java b/persistence-modules/spring-boot-persistence-mongodb-2/src/main/java/com/baeldung/boot/unique/field/data/Customer2.java
deleted file mode 100644
index 523a0a9841..0000000000
--- a/persistence-modules/spring-boot-persistence-mongodb-2/src/main/java/com/baeldung/boot/unique/field/data/Customer2.java
+++ /dev/null
@@ -1,47 +0,0 @@
-package com.baeldung.boot.unique.field.data;
-
-import org.springframework.data.annotation.Id;
-import org.springframework.data.mongodb.core.index.CompoundIndex;
-import org.springframework.data.mongodb.core.mapping.Document;
-
-@Document
-@CompoundIndex(def = "{ 'storeId': 1, 'number': 1 }", unique = true)
-public class Customer2 {
-    @Id
-    private Long storeId;
-
-    private Long number;
-
-    private String name;
-
-    public Customer2() {
-    }
-
-    public Customer2(String name) {
-        this.name = name;
-    }
-
-    public Long getStoreId() {
-        return storeId;
-    }
-
-    public void setStoreId(Long storeId) {
-        this.storeId = storeId;
-    }
-
-    public Long getNumber() {
-        return number;
-    }
-
-    public void setNumber(Long number) {
-        this.number = number;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-}
diff --git a/persistence-modules/spring-boot-persistence-mongodb-2/src/main/java/com/baeldung/boot/unique/field/web/UniqueFieldController.java b/persistence-modules/spring-boot-persistence-mongodb-2/src/main/java/com/baeldung/boot/unique/field/web/UniqueFieldController.java
index 8ac00c497f..716977edd4 100644
--- a/persistence-modules/spring-boot-persistence-mongodb-2/src/main/java/com/baeldung/boot/unique/field/web/UniqueFieldController.java
+++ b/persistence-modules/spring-boot-persistence-mongodb-2/src/main/java/com/baeldung/boot/unique/field/web/UniqueFieldController.java
@@ -13,13 +13,11 @@ import org.springframework.web.bind.annotation.RestController;
 
 import com.baeldung.boot.unique.field.dao.AssetRepository;
 import com.baeldung.boot.unique.field.dao.CompanyRepository;
-import com.baeldung.boot.unique.field.dao.Customer2Repository;
 import com.baeldung.boot.unique.field.dao.CustomerRepository;
 import com.baeldung.boot.unique.field.dao.SaleRepository;
 import com.baeldung.boot.unique.field.data.Asset;
 import com.baeldung.boot.unique.field.data.Company;
 import com.baeldung.boot.unique.field.data.Customer;
-import com.baeldung.boot.unique.field.data.Customer2;
 import com.baeldung.boot.unique.field.data.Sale;
 import com.baeldung.boot.unique.field.data.SaleId;
 
@@ -35,9 +33,6 @@ public class UniqueFieldController {
     @Autowired
     private CustomerRepository customerRepo;
 
-    @Autowired
-    private Customer2Repository customer2Repo;
-
     @Autowired
     private AssetRepository assetRepo;
 
@@ -71,11 +66,6 @@ public class UniqueFieldController {
         return customerRepo.insert(customer);
     }
 
-    @PostMapping("/customer2")
-    public Customer2 post(@RequestBody Customer2 customer) {
-        return customer2Repo.insert(customer);
-    }
-
     @GetMapping("/customer/{id}")
     public Optional<Customer> getCustomer(@PathVariable String id) {
         return customerRepo.findById(id);