diff --git a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/AccountServiceImpl.java b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/AccountServiceImpl.java
index 0849979..ad7cb61 100644
--- a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/AccountServiceImpl.java
+++ b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/AccountServiceImpl.java
@@ -5,6 +5,7 @@ import de.htwsaar.webshop.repository.CustomerRepository;
 import de.htwsaar.webshop.repository.entities.Account;
 import de.htwsaar.webshop.service.AccountService;
 import de.htwsaar.webshop.service.PasswordService;
+import jakarta.transaction.Transactional;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
@@ -29,11 +30,13 @@ public class AccountServiceImpl implements AccountService {
     }
 
     @Override
+    @Transactional
     public Account save(Account account) {
         return accountRepository.save(account);
     }
 
     @Override
+    @Transactional
     public Account saveNew(Account account) {
         if (account.getCustomer() != null) {
             account.getCustomer().setId(null); // Ensure new customer
@@ -44,6 +47,7 @@ public class AccountServiceImpl implements AccountService {
     }
 
     @Override
+    @Transactional
     public boolean deleteIfExists(Account account) {
         Account tbd = accountRepository.getAccountByEmail(account.getEmail());
         if (tbd == null) {
@@ -54,6 +58,7 @@ public class AccountServiceImpl implements AccountService {
     }
 
     @Override
+    @Transactional
     public boolean deleteIfExists(Long id) {
         Account tbd = accountRepository.getAccountById(id);
         if (tbd == null) {
@@ -78,6 +83,7 @@ public class AccountServiceImpl implements AccountService {
     }
 
     @Override
+    @Transactional
     public boolean setAdmin(Long id, boolean admin) {
         if (id == null) {
             return false;
diff --git a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/ArticleServiceImpl.java b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/ArticleServiceImpl.java
index 4b3fabe..9efe8dc 100644
--- a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/ArticleServiceImpl.java
+++ b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/ArticleServiceImpl.java
@@ -52,11 +52,13 @@ public class ArticleServiceImpl implements ArticleService {
     }
 
     @Override
+    @Transactional
     public void delete(Long id) {
         articleRepository.deleteById(id);
     }
 
     @Override
+    @Transactional
     public void delete(UUID uuid) {
         articleRepository.deleteByUuid(uuid);
     }
diff --git a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/CustomerServiceImpl.java b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/CustomerServiceImpl.java
index fda58ed..37c0daf 100644
--- a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/CustomerServiceImpl.java
+++ b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/CustomerServiceImpl.java
@@ -3,6 +3,7 @@ package de.htwsaar.webshop.service.impl;
 import de.htwsaar.webshop.repository.CustomerRepository;
 import de.htwsaar.webshop.repository.entities.Customer;
 import de.htwsaar.webshop.service.CustomerService;
+import jakarta.transaction.Transactional;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -18,11 +19,13 @@ public class CustomerServiceImpl implements CustomerService {
     }
 
     @Override
+    @Transactional
     public Customer save(Customer customer) {
         return customerRepository.save(customer);
     }
 
     @Override
+    @Transactional
     public void delete(Customer customer) {
         customerRepository.delete(customer);
     }
diff --git a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/FarmImageServiceImpl.java b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/FarmImageServiceImpl.java
index 7e9f326..75ddacf 100644
--- a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/FarmImageServiceImpl.java
+++ b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/FarmImageServiceImpl.java
@@ -12,9 +12,7 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
-import org.springframework.web.multipart.MultipartFile;
 
-import java.util.Base64;
 import java.util.List;
 import java.util.UUID;
 
@@ -55,11 +53,13 @@ public class FarmImageServiceImpl implements FarmImageService {
     }
 
     @Override
+    @Transactional
     public FarmImage save(FarmImageModel model) {
         return save(new FarmImage(model.getId(), articleService.findByUUID(model.getArticleUuid()), model.getBase64(), model.getStandard()));
     }
 
     @Override
+    @Transactional
     public FarmImage save(UUID uuid, String base64, boolean standard) {
         if (uuid == null) {
             log.warn("Got no UUID, aborting");
diff --git a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/ImageServiceImpl.java b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/ImageServiceImpl.java
index 61ae398..b69b774 100644
--- a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/ImageServiceImpl.java
+++ b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/ImageServiceImpl.java
@@ -51,11 +51,13 @@ public class ImageServiceImpl implements ImageService {
     }
 
     @Override
+    @Transactional
     public Image save(ImageModel model) {
         return save(new Image(model.getId(), articleService.findByUUID(model.getArticleUuid()), model.getBase64()));
     }
 
     @Override
+    @Transactional
     public Image save(UUID uuid, MultipartFile file) {
         if (uuid == null) {
             log.warn("Got no UUID, aborting");
@@ -85,6 +87,7 @@ public class ImageServiceImpl implements ImageService {
     }
 
     @Override
+    @Transactional
     public Image save(UUID uuid, String base64) {
         if (uuid == null) {
             log.warn("Got no UUID, aborting");
diff --git a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/OrderServiceImpl.java b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/OrderServiceImpl.java
index 15ecec5..96589f5 100644
--- a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/OrderServiceImpl.java
+++ b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/OrderServiceImpl.java
@@ -13,6 +13,7 @@ import de.htwsaar.webshop.util.TimeUtil;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -41,11 +42,13 @@ public class OrderServiceImpl implements OrderService {
     }
 
     @Override
+    @Transactional
     public Order saveNew(Order order) {
         return orderRepository.save(order);
     }
 
     @Override
+    @Transactional
     public Order saveNew(OrderModel model) {
         Order order = saveNew(new Order(
                 model.getId(),
@@ -75,6 +78,7 @@ public class OrderServiceImpl implements OrderService {
     }
 
     @Override
+    @Transactional
     public void delete(Long orderId) {
         orderRepository.deleteById(orderId);
     }
diff --git a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/ReviewServiceImpl.java b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/ReviewServiceImpl.java
index f79701a..3bd6646 100644
--- a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/ReviewServiceImpl.java
+++ b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/ReviewServiceImpl.java
@@ -8,6 +8,7 @@ import de.htwsaar.webshop.service.ReviewService;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import java.util.List;
 import java.util.UUID;
@@ -25,12 +26,14 @@ public class ReviewServiceImpl implements ReviewService {
     }
 
     @Override
+    @Transactional
     public Review save(Review review) {
         review.setTimestamp(System.currentTimeMillis());
         return reviewRepository.save(review);
     }
 
     @Override
+    @Transactional
     public Review save(UUID articleUuid, int rating, String content) {
         if (articleUuid == null) {
             return null;
@@ -40,6 +43,7 @@ public class ReviewServiceImpl implements ReviewService {
     }
 
     @Override
+    @Transactional
     public void delete(Long reviewId) {
         reviewRepository.deleteById(reviewId);
     }
diff --git a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/SessionServiceImpl.java b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/SessionServiceImpl.java
index e718d08..d5b0ba8 100644
--- a/00-backend/src/main/java/de/htwsaar/webshop/service/impl/SessionServiceImpl.java
+++ b/00-backend/src/main/java/de/htwsaar/webshop/service/impl/SessionServiceImpl.java
@@ -9,6 +9,7 @@ import de.htwsaar.webshop.util.TimeUtil;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import java.util.UUID;
 
@@ -26,6 +27,7 @@ public class SessionServiceImpl implements SessionService {
     }
 
     @Override
+    @Transactional
     public Session create(Account account) {
         long timeout = TimeUtil.nowPlusDays(7);
         UUID token = UUID.randomUUID();
@@ -34,6 +36,7 @@ public class SessionServiceImpl implements SessionService {
     }
 
     @Override
+    @Transactional
     public void delete(Session session) {
         sessionRepository.delete(session);
     }
@@ -59,7 +62,6 @@ public class SessionServiceImpl implements SessionService {
         }
         if (session.getTimeout() <= System.currentTimeMillis()) {
             log.info("Session with email {} is expired", email);
-            delete(session);
             return false;
         }
         log.info("Session with email {} is valid", email);
@@ -94,6 +96,7 @@ public class SessionServiceImpl implements SessionService {
     }
 
     @Override
+    @Transactional
     public void deleteExpired() {
         sessionRepository.deleteSessionsByTimeoutBefore(System.currentTimeMillis());
     }