diff --git a/frontend b/frontend
index 630ceb9..07607d9 160000
--- a/frontend
+++ b/frontend
@@ -1 +1 @@
-Subproject commit 630ceb9241ce4fc707b572f689a2b27c13be52cd
+Subproject commit 07607d9464726e2628d58e37dc7fe06e37ff3605
diff --git a/src/main/java/ru/serega6531/packmate/controller/PatternController.java b/src/main/java/ru/serega6531/packmate/controller/PatternController.java
index 03df2f3..8c5c2ab 100644
--- a/src/main/java/ru/serega6531/packmate/controller/PatternController.java
+++ b/src/main/java/ru/serega6531/packmate/controller/PatternController.java
@@ -56,7 +56,6 @@ public class PatternController {
     @PostMapping
     public PatternDto addPattern(@RequestBody PatternCreateDto dto) {
         return service.create(dto);
-
     }
 
     @PostMapping("/{id}")
diff --git a/src/main/java/ru/serega6531/packmate/service/ServicesService.java b/src/main/java/ru/serega6531/packmate/service/ServicesService.java
index 1aefda5..358b530 100644
--- a/src/main/java/ru/serega6531/packmate/service/ServicesService.java
+++ b/src/main/java/ru/serega6531/packmate/service/ServicesService.java
@@ -90,6 +90,10 @@ public class ServicesService {
 
     @Transactional
     public ServiceDto create(ServiceCreateDto dto) {
+        if (repository.existsById(dto.getPort())) {
+            throw new IllegalArgumentException("Service already exists");
+        }
+
         CtfService service = fromDto(dto);
 
         log.info("Added service '{}' at port {}", service.getName(), service.getPort());