diff --git a/README.md b/README.md
index 683e73c..5bcc953 100644
--- a/README.md
+++ b/README.md
@@ -71,11 +71,13 @@
 
 Release Notes
 -------------
-### 4.14 - 1 Jul 2017
+### 4.14.1 - 4 Jul 2017
+- Bug fix: Possibility of error in forking repository
 
+### 4.14 - 1 Jul 2017
 - Support priority in issues and pull requests
 - Show icons when the sidebar is collapsed
-- Support gollumn events in web hook
+- Support gollum events in web hook
 - Support account (user / group) level web hook
 - Add `--max_file_size` option
 - Configuration by system property or environment variable
diff --git a/build.sbt b/build.sbt
index 22e7b81..c941cce 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 val Organization = "io.github.gitbucket"
 val Name = "gitbucket"
-val GitBucketVersion = "4.14.0"
+val GitBucketVersion = "4.14.1"
 val ScalatraVersion = "2.5.0"
 val JettyVersion = "9.3.19.v20170502"
 
diff --git a/src/main/scala/gitbucket/core/GitBucketCoreModule.scala b/src/main/scala/gitbucket/core/GitBucketCoreModule.scala
index 8d678b3..b5a2df8 100644
--- a/src/main/scala/gitbucket/core/GitBucketCoreModule.scala
+++ b/src/main/scala/gitbucket/core/GitBucketCoreModule.scala
@@ -38,5 +38,6 @@
   new Version("4.14.0",
     new LiquibaseMigration("update/gitbucket-core_4.14.xml"),
     new SqlMigration("update/gitbucket-core_4.14.sql")
-  )
+  ),
+  new Version("4.14.1")
 )
diff --git a/src/main/scala/gitbucket/core/controller/AccountController.scala b/src/main/scala/gitbucket/core/controller/AccountController.scala
index c95f4fc..77eaa1a 100644
--- a/src/main/scala/gitbucket/core/controller/AccountController.scala
+++ b/src/main/scala/gitbucket/core/controller/AccountController.scala
@@ -594,22 +594,23 @@
 
           // Insert default labels
           insertDefaultLabels(accountName, repository.name)
+          // Insert default priorities
+          insertDefaultPriorities(accountName, repository.name)
 
           // clone repository actually
           JGitUtil.cloneRepository(
             getRepositoryDir(repository.owner, repository.name),
-            getRepositoryDir(accountName, repository.name))
+            FileUtil.deleteIfExists(getRepositoryDir(accountName, repository.name)))
 
           // Create Wiki repository
-          JGitUtil.cloneRepository(
-            getWikiRepositoryDir(repository.owner, repository.name),
-            getWikiRepositoryDir(accountName, repository.name))
+          JGitUtil.cloneRepository(getWikiRepositoryDir(repository.owner, repository.name),
+            FileUtil.deleteIfExists(getWikiRepositoryDir(accountName, repository.name)))
 
-          // Copy files
-          FileUtils.copyDirectory(
-            Directory.getRepositoryFilesDir(repository.owner, repository.name),
-            Directory.getRepositoryFilesDir(accountName, repository.name)
-          )
+          // Copy LFS files
+          val lfsDir = getLfsDir(repository.owner, repository.name)
+          if(lfsDir.exists){
+            FileUtils.copyDirectory(lfsDir, FileUtil.deleteIfExists(getLfsDir(accountName, repository.name)))
+          }
 
           // Record activity
           recordForkActivity(repository.owner, repository.name, loginUserName, accountName)
diff --git a/src/main/scala/gitbucket/core/controller/RepositorySettingsController.scala b/src/main/scala/gitbucket/core/controller/RepositorySettingsController.scala
index 7c4bc5e..4ef39e3 100644
--- a/src/main/scala/gitbucket/core/controller/RepositorySettingsController.scala
+++ b/src/main/scala/gitbucket/core/controller/RepositorySettingsController.scala
@@ -355,7 +355,7 @@
             FileUtils.moveDirectory(dir, getAttachedDir(form.newOwner, repository.name))
           }
         }
-        // Delere parent directory
+        // Delete parent directory
         FileUtil.deleteDirectoryIfEmpty(getRepositoryFilesDir(repository.owner, repository.name))
 
         // Call hooks
diff --git a/src/main/scala/gitbucket/core/util/FileUtil.scala b/src/main/scala/gitbucket/core/util/FileUtil.scala
index 4f2a21d..e31dd6b 100644
--- a/src/main/scala/gitbucket/core/util/FileUtil.scala
+++ b/src/main/scala/gitbucket/core/util/FileUtil.scala
@@ -68,9 +68,24 @@
 
   def readableSize(size: Long): String = FileUtils.byteCountToDisplaySize(size)
 
+  /**
+   * Delete the given directory if it's empty.
+   * Do nothing if the given File is not a directory or not empty.
+   */
   def deleteDirectoryIfEmpty(dir: File): Unit = {
     if(dir.isDirectory() && dir.list().isEmpty) {
       FileUtils.deleteDirectory(dir)
     }
   }
+
+  /**
+   * Delete file or directory forcibly.
+   */
+  def deleteIfExists(file: java.io.File): java.io.File = {
+    if(file.exists){
+      FileUtils.forceDelete(file)
+    }
+    file
+  }
+
 }