diff --git a/src/main/java/ru/ulstu/extractor/service/GitRepositoryService.java b/src/main/java/ru/ulstu/extractor/service/GitRepositoryService.java
index 31773d6..87ac342 100644
--- a/src/main/java/ru/ulstu/extractor/service/GitRepositoryService.java
+++ b/src/main/java/ru/ulstu/extractor/service/GitRepositoryService.java
@@ -25,6 +25,9 @@ import ru.ulstu.extractor.model.LineChange;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URISyntaxException;
+import java.net.URL;
 import java.nio.file.Path;
 import java.time.Instant;
 import java.util.ArrayList;
@@ -141,10 +144,22 @@ public class GitRepositoryService {
     }
 
     private File getProjectDirectoryFile(String url) {
+        validateUrl(url);
         return Path.of(getProjectDirectory(url))
                 .toFile();
     }
 
+    private void validateUrl(String url) {
+        if (url == null || url.isEmpty()) {
+            throw new RuntimeException("Repository url must not empty");
+        }
+        try {
+            new URL(url).toURI();
+        } catch (MalformedURLException | URISyntaxException e) {
+            throw new RuntimeException("Repository url not valid");
+        }
+    }
+
     private boolean projectDirExists(File file) {
         return file.exists();
     }
diff --git a/src/main/java/ru/ulstu/extractor/service/IndexService.java b/src/main/java/ru/ulstu/extractor/service/IndexService.java
index 4ffdb62..62925db 100644
--- a/src/main/java/ru/ulstu/extractor/service/IndexService.java
+++ b/src/main/java/ru/ulstu/extractor/service/IndexService.java
@@ -48,15 +48,16 @@ public class IndexService {
     public void index(@NotNull String repositoryUrl, @NotNull String branchName) throws GitAPIException, IOException {
         Repository repository = repositoryRepository.findByUrl(repositoryUrl);
         if (repository == null) {
-            repositoryRepository.save(new Repository(repositoryUrl));
+            repository = repositoryRepository.save(new Repository(repositoryUrl));
         }
         Branch branch = branchRepository.findByRepositoryAndName(repository, branchName);
         if (branch == null) {
             branch = branchRepository.save(new Branch(repository, branchName));
         }
         List<Commit> commits = gitRepositoryService.getCommits(repositoryUrl, branchName);
-        commitRepository.deleteAll(branch.getCommits());
+        List<Commit> commitsToRemove = branch.getCommits();
         branch.getCommits().clear();
+        commitRepository.deleteAll(commitsToRemove);
         branch.setCommits(commits);
         branchRepository.save(branch);
     }
diff --git a/src/main/resources/templates/indexNewRepository.html b/src/main/resources/templates/indexNewRepository.html
index 56da344..894024c 100644
--- a/src/main/resources/templates/indexNewRepository.html
+++ b/src/main/resources/templates/indexNewRepository.html
@@ -11,11 +11,12 @@
     <form action="#" th:action="${@route.INDEXING_NEW_REPOSITORY}" th:object="${repoForm}" method="post">
         <button class="btn btn-outline-dark dropdown-toggle" type="button" data-toggle="collapse"
                 data-target="#collapseOne" aria-expanded="false" aria-controls="collapseExample"
-                th:if="${repoForm.repo != null}"
-                th:text="${repoForm.repo == null ? 'Репозиторий' : repoForm.repo}">
+                th:if="${repoForm.repo != '' && repoForm.repo != null && (error == '' || error == null)}"
+                th:text="${repoForm.repo == '' || repoForm.repo == null ? 'Репозиторий' : repoForm.repo}">
             Button with data-target
         </button>
-        <div id="collapseOne" th:class="${repoForm.repo == null ? 'collapse show' : 'collapse'}"
+        <div id="collapseOne"
+             th:class="${repoForm.repo == '' || repoForm.repo == null || (error != '' && error != null) ? 'collapse show' : 'collapse'}"
              aria-labelledby="headingOne">
             <div class="card-body">
                 <div class="form-group">
@@ -34,7 +35,8 @@
                 </div>
             </div>
         </div>
-        <div id="collapseTwo" class="collapse show" aria-labelledby="headingOne" th:if="${repoForm.repo != null}">
+        <div id="collapseTwo" class="collapse show" aria-labelledby="headingOne"
+             th:if="${repoForm.repo != '' && repoForm.repo != null && (error == '' || error == null) }">
             <div class="card-body">
                 <div class="form-group">
                     <label for="select-branch">Ветки:</label>