* Fix bug#21981

module/programplan/lang/en.php

@@ -79,3 +79,4 @@ $lang->programplan->error->planFinishSmall = 'The "End" date must be > the "Begi
 $lang->programplan->error->percentOver     = 'The sum of "Workload %" cannot exceed 100%.';
 $lang->programplan->error->createdTask     = 'The task is decomposed. Sub stages cannot be added.';
 $lang->programplan->error->parentWorkload  = 'The sum of the workload in the sub stage cannot be > that in the parent stage: %s.';
+$lang->programplan->error->sameName        = 'Stage name cannot be the same!';

module/programplan/lang/zh-cn.php

@@ -80,3 +80,4 @@ $lang->programplan->error->percentOver     = '工作量占比累计不应当超
 $lang->programplan->error->createdTask     = '已分解任务,不可添加子阶段';
 $lang->programplan->error->parentWorkload  = '子阶段的工作量之和不能大于父阶段的工作量:%s';
 $lang->programplan->error->parentDuration  = '子阶段计划开始、计划完成不能超过父阶段';
+$lang->programplan->error->sameName        = '阶段名称不能相同！';

module/programplan/model.php

@@ -433,6 +433,9 @@ class programplanModel extends model
             $parentACL       = $parentStage->acl;
         }
 
+        $names = array_filter($names);
+        if(count(array_unique($names)) != count($names)) return dao::$errors['message'][] = $this->lang->programplan->error->sameName;
+
         $datas = array();
         foreach($names as $key => $name)
         {