diff --git a/module/custom/control.php b/module/custom/control.php
index 7b64f7bd93..02d2676ae5 100644
--- a/module/custom/control.php
+++ b/module/custom/control.php
@@ -131,7 +131,7 @@ class custom extends control
                     {
                         if(!is_numeric($key) or $key > 255) $this->send(array('result' => 'fail', 'message' => $this->lang->custom->notice->invalidNumberKey));
                     }
-                    if(!empty($key) and !isset($oldCustoms[$key]) and $key != 'n/a' and !validater::checkREG($key, '/^[a-z_0-9]+$/')) $this->send(array('result' => 'fail', 'message' => $this->lang->custom->notice->invalidStringKey));
+                    if(!empty($key) and !empty($oldCustoms) and !isset($oldCustoms[$key]) and $key != 'n/a' and !validater::checkREG($key, '/^[a-z_0-9]+$/')) $this->send(array('result' => 'fail', 'message' => $this->lang->custom->notice->invalidStringKey));
 
                     /* The length of roleList in user module and typeList in todo module is less than 10. check it when saved. */
                     if($field == 'roleList' or $module == 'todo' and $field == 'typeList')
diff --git a/module/group/model.php b/module/group/model.php
index c195cbe969..056d98b5d7 100644
--- a/module/group/model.php
+++ b/module/group/model.php
@@ -290,6 +290,10 @@ class groupModel extends model
         }
         $actions['actions'] = $dynamic;
 
+        /* If not select any projects or products, set it empty. */
+        if(isset($actions['products'][0]) && !$actions['products'][0]) $actions['products'] = array();
+        if(isset($actions['projects'][0]) && !$actions['projects'][0]) $actions['projects'] = array();
+
         $actions = empty($actions) ? '' : json_encode($actions);
         $this->dao->update(TABLE_GROUP)->set('acl')->eq($actions)->where('id')->eq($groupID)->exec();
         return dao::isError() ? false : true;
diff --git a/module/testtask/lang/zh-cn.php b/module/testtask/lang/zh-cn.php
index 2b6fe37bb6..7543a350a3 100644
--- a/module/testtask/lang/zh-cn.php
+++ b/module/testtask/lang/zh-cn.php
@@ -108,7 +108,7 @@ $lang->testtask->fail          = '失败';
 $lang->testtask->showResult    = '共执行<span class="text-info">%s</span>次';
 $lang->testtask->showFail      = '失败<span class="text-danger">%s</span>次';
 
-$lang->testtask->confirmDelete     = '您确认要删除该版本吗？';
+$lang->testtask->confirmDelete     = '您确认要删除该测试单吗？';
 $lang->testtask->confirmUnlinkCase = '您确认要移除该用例吗？';
 $lang->testtask->noticeNoOther     = '该产品还没有其他测试版本';
 $lang->testtask->noTesttask        = '暂时没有测试版本。';