[Fix partially kbss-cvut/fta-fmea-ui#574] Throw exception on system r…

…ename if system with the same name exists

src/main/java/cz/cvut/kbss/analysis/service/SystemRepositoryService.java

@@ -73,7 +73,7 @@ public System create(System system){
         if(!existingSystems.isEmpty())
             throw new LogicViolationException((
                     "Cannot create system with name \"%s\", " +
-                            "the name is already assigned by other system.")
+                            "the name is already assigned to another system.")
                     .formatted(system.getName()));
         this.persist(system);
         return system;
@@ -96,6 +96,12 @@ public void remove(@NonNull URI instanceUri) {
     @Transactional
     public System rename(System systemRename) {
         log.info("> rename - {}", systemRename);
+        List<URI> existingSystems = systemDao.findUriByName(systemRename.getName());
+        if(!existingSystems.isEmpty())
+            throw new LogicViolationException((
+                    "Cannot rename system to \"%s\", " +
+                            "the name is already assigned to another system.")
+                    .formatted(systemRename.getName()));
 
         System system = findRequired(systemRename.getUri());
         system.setName(systemRename.getName());