(refs #2)Fork repository can not be changed repository type.

src/main/scala/app/RepositorySettingsController.scala

@@ -45,7 +45,15 @@ trait RepositorySettingsControllerBase extends ControllerBase with FlashMapSuppo
    * Save the repository options.
    */
   post("/:owner/:repository/settings/options", optionsForm)(ownerOnly { (form, repository) =>
-    saveRepositoryOptions(repository.owner, repository.name, form.description, form.defaultBranch, form.isPrivate)
+    saveRepositoryOptions(
+      repository.owner,
+      repository.name,
+      form.description,
+      form.defaultBranch,
+      repository.repository.parentUserName.map { _ =>
+        repository.repository.isPrivate
+      } getOrElse form.isPrivate
+    )
     flash += "info" -> "Repository settings has been updated."
     redirect(s"/${repository.owner}/${repository.name}/settings/options")
   })