diff --git a/module/productplan/model.php b/module/productplan/model.php
index daceb3f9d2..d375a90251 100644
--- a/module/productplan/model.php
+++ b/module/productplan/model.php
@@ -86,7 +86,12 @@ class productplanModel extends model
     public function create()
     {
         $plan = fixer::input('post')->stripTags('title')->get();
-        $this->dao->insert(TABLE_PRODUCTPLAN)->data($plan)->autoCheck()->batchCheck($this->config->productplan->create->requiredFields, 'notempty')->exec();
+        $this->dao->insert(TABLE_PRODUCTPLAN)
+            ->data($plan)
+            ->autoCheck()
+            ->batchCheck($this->config->productplan->create->requiredFields, 'notempty')
+            ->check('end', 'gt', $plan->begin)
+            ->exec();
         if(!dao::isError()) return $this->dao->lastInsertID();
     }
 
@@ -101,7 +106,13 @@ class productplanModel extends model
     {
         $oldPlan = $this->getById($planID);
         $plan = fixer::input('post')->stripTags('title')->get();
-        $this->dao->update(TABLE_PRODUCTPLAN)->data($plan)->autoCheck()->batchCheck($this->config->productplan->edit->requiredFields, 'notempty')->where('id')->eq((int)$planID)->exec();
+        $this->dao->update(TABLE_PRODUCTPLAN)
+            ->data($plan)
+            ->autoCheck()
+            ->batchCheck($this->config->productplan->edit->requiredFields, 'notempty')
+            ->check('end', 'gt', $plan->begin)
+            ->where('id')->eq((int)$planID)
+            ->exec();
         if(!dao::isError()) return common::createChanges($oldPlan, $plan);
     }