diff --git a/module/programplan/lang/en.php b/module/programplan/lang/en.php
index dc4560fe48..cfca25e3f2 100644
--- a/module/programplan/lang/en.php
+++ b/module/programplan/lang/en.php
@@ -63,5 +63,4 @@ $lang->programplan->error                  = new stdclass();
 $lang->programplan->error->percentNumber   = '"Workload Ration" must be number';
 $lang->programplan->error->planFinishSmall = '"Finish" must greater than "Begin"';
 $lang->programplan->error->percentOver     = 'The "Workload Ration" total cannot exceed 100%';
-$lang->programplan->error->onlyOneDev      = 'Only one development type of phase plan can be set per phase plan';
 $lang->programplan->error->createdTask     = 'The task has been decompose. Subphases cannot be added';
diff --git a/module/programplan/lang/zh-cn.php b/module/programplan/lang/zh-cn.php
index c253d715dd..f60b9e12dd 100644
--- a/module/programplan/lang/zh-cn.php
+++ b/module/programplan/lang/zh-cn.php
@@ -63,5 +63,4 @@ $lang->programplan->error                  = new stdclass();
 $lang->programplan->error->percentNumber   = '"工作量比例"必须为数字';
 $lang->programplan->error->planFinishSmall = '"计划完成时间"必须大于"计划开始时间"';
 $lang->programplan->error->percentOver     = '"工作量比例"累计不应当超过100%';
-$lang->programplan->error->onlyOneDev      = '一级阶段计划只能设置一个开发类型的阶段计划';
 $lang->programplan->error->createdTask     = '已分解任务,不可添加子阶段';