diff --git a/spring-core/src/main/java/com/baeldung/dependency/exception/app/CustomConfiguration.java b/spring-core/src/main/java/com/baeldung/dependency/exception/app/CustomConfiguration.java
new file mode 100644
index 0000000000..4366cb617a
--- /dev/null
+++ b/spring-core/src/main/java/com/baeldung/dependency/exception/app/CustomConfiguration.java
@@ -0,0 +1,13 @@
+package com.baeldung.dependency.exception.app;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+
+@SpringBootApplication
+@ComponentScan(basePackages = "com.baeldung.dependency.exception")
+public class CustomConfiguration {
+    public static void main(String[] args) {
+        SpringApplication.run(CustomConfiguration.class, args);
+    }
+}
diff --git a/spring-core/src/main/java/com/baeldung/dependency/exception/app/PurchaseDeptService.java b/spring-core/src/main/java/com/baeldung/dependency/exception/app/PurchaseDeptService.java
new file mode 100644
index 0000000000..1e6fad63aa
--- /dev/null
+++ b/spring-core/src/main/java/com/baeldung/dependency/exception/app/PurchaseDeptService.java
@@ -0,0 +1,13 @@
+package com.baeldung.dependency.exception.app;
+
+import com.baeldung.dependency.exception.repository.InventoryRepository;
+import org.springframework.stereotype.Service;
+
+@Service
+public class PurchaseDeptService {
+    private InventoryRepository repository;
+
+    public PurchaseDeptService(InventoryRepository repository) {
+        this.repository = repository;
+    }
+}
\ No newline at end of file
diff --git a/spring-core/src/main/java/com/baeldung/dependency/exception/repository/DressRepository.java b/spring-core/src/main/java/com/baeldung/dependency/exception/repository/DressRepository.java
new file mode 100644
index 0000000000..4a6c836143
--- /dev/null
+++ b/spring-core/src/main/java/com/baeldung/dependency/exception/repository/DressRepository.java
@@ -0,0 +1,9 @@
+package com.baeldung.dependency.exception.repository;
+
+import org.springframework.context.annotation.Primary;
+import org.springframework.stereotype.Repository;
+
+@Primary
+@Repository
+public class DressRepository implements InventoryRepository {
+}
diff --git a/spring-core/src/main/java/com/baeldung/dependency/exception/repository/InventoryRepository.java b/spring-core/src/main/java/com/baeldung/dependency/exception/repository/InventoryRepository.java
new file mode 100644
index 0000000000..ccb2ad9c32
--- /dev/null
+++ b/spring-core/src/main/java/com/baeldung/dependency/exception/repository/InventoryRepository.java
@@ -0,0 +1,7 @@
+package com.baeldung.dependency.exception.repository;
+
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface InventoryRepository {
+}
diff --git a/spring-core/src/main/java/com/baeldung/dependency/exception/repository/ShoeRepository.java b/spring-core/src/main/java/com/baeldung/dependency/exception/repository/ShoeRepository.java
new file mode 100644
index 0000000000..60495914cd
--- /dev/null
+++ b/spring-core/src/main/java/com/baeldung/dependency/exception/repository/ShoeRepository.java
@@ -0,0 +1,7 @@
+package com.baeldung.dependency.exception.repository;
+
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class ShoeRepository implements InventoryRepository {
+}