diff --git a/persistence-modules/spring-boot-persistence-4/src/main/java/com/baeldung/listvsset/eager/list/moderatedomain/GroupService.java b/persistence-modules/spring-boot-persistence-4/src/main/java/com/baeldung/listvsset/eager/list/moderatedomain/GroupService.java
index 3f84410f94..d854922ec8 100644
--- a/persistence-modules/spring-boot-persistence-4/src/main/java/com/baeldung/listvsset/eager/list/moderatedomain/GroupService.java
+++ b/persistence-modules/spring-boot-persistence-4/src/main/java/com/baeldung/listvsset/eager/list/moderatedomain/GroupService.java
@@ -4,8 +4,10 @@ import java.util.List;
 import java.util.Optional;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 @Service
+@Transactional
 public class GroupService {
 
     private final GroupRepository groupRepository;
diff --git a/persistence-modules/spring-boot-persistence-4/src/main/java/com/baeldung/listvsset/eager/set/lazy/moderatedomain/GroupService.java b/persistence-modules/spring-boot-persistence-4/src/main/java/com/baeldung/listvsset/eager/set/lazy/moderatedomain/GroupService.java
index 9fd9407309..7a19f5ede9 100644
--- a/persistence-modules/spring-boot-persistence-4/src/main/java/com/baeldung/listvsset/eager/set/lazy/moderatedomain/GroupService.java
+++ b/persistence-modules/spring-boot-persistence-4/src/main/java/com/baeldung/listvsset/eager/set/lazy/moderatedomain/GroupService.java
@@ -4,8 +4,10 @@ import java.util.List;
 import java.util.Optional;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 @Service
+@Transactional
 public class GroupService {
 
     private final GroupRepository groupRepository;
diff --git a/persistence-modules/spring-boot-persistence-4/src/main/java/com/baeldung/listvsset/eager/set/moderatedomain/GroupService.java b/persistence-modules/spring-boot-persistence-4/src/main/java/com/baeldung/listvsset/eager/set/moderatedomain/GroupService.java
index 3a8a4fcaa3..cb57512642 100644
--- a/persistence-modules/spring-boot-persistence-4/src/main/java/com/baeldung/listvsset/eager/set/moderatedomain/GroupService.java
+++ b/persistence-modules/spring-boot-persistence-4/src/main/java/com/baeldung/listvsset/eager/set/moderatedomain/GroupService.java
@@ -4,8 +4,10 @@ import java.util.List;
 import java.util.Optional;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 @Service
+@Transactional
 public class GroupService {
 
     private final GroupRepository groupRepository;
@@ -27,3 +29,4 @@ public class GroupService {
         groupRepository.save(group);
     }
 }
+