diff --git a/module/productplan/js/batchedit.js b/module/productplan/js/batchedit.js
index e8b5d625ad..96528d7dbc 100644
--- a/module/productplan/js/batchedit.js
+++ b/module/productplan/js/batchedit.js
@@ -9,17 +9,17 @@ function changeDate(planID)
 {
     if($("#future"+planID).prop('checked'))
     {
-        $("input[name='begin["+planID+"]']").val('2030-01-01').removeClass('form-input-show').addClass('form-input-hidden');
-        $("input[name='end["+planID+"]']").val('2030-01-01').removeClass('form-input-show').addClass('form-input-hidden');
-        $("input[name='begin"+planID+"']").val('').removeClass('form-input-hidden').addClass('form-input-show');
-        $("input[name='end"+planID+"']").val('').removeClass('form-input-hidden').addClass('form-input-show');
+        $("input[name='begin[" + planID + "]']").val('2030-01-01').removeClass('form-input-show').addClass('form-input-hidden');
+        $("input[name='end[" + planID + "]']").val('2030-01-01').removeClass('form-input-show').addClass('form-input-hidden');
+        $("input[name='begin" + planID + "']").val('').removeClass('form-input-hidden').addClass('form-input-show');
+        $("input[name='end" + planID + "']").val('').removeClass('form-input-hidden').addClass('form-input-show');
     }
     else
     {
-        $("input[name='begin["+planID+"]']").val('').removeClass('form-input-hidden').addClass('form-input-show');
-        $("input[name='end["+planID+"]']").val('').removeClass('form-input-hidden').addClass('form-input-show');
-        $("input[name='begin"+planID+"']").removeClass('form-input-show').addClass('form-input-hidden');
-        $("input[name='end"+planID+"']").removeClass('form-input-show').addClass('form-input-hidden');
+        $("input[name='begin[" + planID + "]']").val('').removeClass('form-input-hidden').addClass('form-input-show');
+        $("input[name='end[" + planID + "]']").val('').removeClass('form-input-hidden').addClass('form-input-show');
+        $("input[name='begin" + planID + "']").removeClass('form-input-show').addClass('form-input-hidden');
+        $("input[name='end" + planID + "']").removeClass('form-input-show').addClass('form-input-hidden');
 
         $('.form-date').datetimepicker('update');
     }
@@ -37,19 +37,19 @@ function setPlanStatus(planID, status)
 {
     if(status != 'wait')
     {
-        $('#future'+planID).closest('div').addClass('hidden');
-        $("input[name='begin["+planID+"]']").closest('td').addClass('required');
-        $("input[name='end["+planID+"]']").closest('td').addClass('required');
-        $("input[name='begin"+planID+"']").removeAttr('disabled');
-        $("input[name='end"+planID+"']").removeAttr('disabled');
+        $('#future' + planID).closest('div').addClass('hidden');
+        $("input[name='begin[" + planID + "]']").closest('td').addClass('required');
+        $("input[name='end[" + planID + "]']").closest('td').addClass('required');
+        $("input[name='begin" + planID + "']").removeAttr('disabled');
+        $("input[name='end" + planID + "']").removeAttr('disabled');
     }
     else
     {
-        $('#future'+planID).closest('div').removeClass('hidden');
-        $("input[name='begin["+planID+"]']").closest('td').removeClass('required');
-        $("input[name='end["+planID+"]']").closest('td').removeClass('required');
-        $("input[name='begin"+planID+"']").attr('disabled', 'disabled');
-        $("input[name='end"+planID+"']").attr('disabled', 'disabled');
+        $('#future' + planID).closest('div').removeClass('hidden');
+        $("input[name='begin[" + planID + "]']").closest('td').removeClass('required');
+        $("input[name='end[" + planID + "]']").closest('td').removeClass('required');
+        $("input[name='begin" + planID + "']").attr('disabled', 'disabled');
+        $("input[name='end" + planID + "']").attr('disabled', 'disabled');
     }
 }
 
diff --git a/module/productplan/model.php b/module/productplan/model.php
index 556861ac16..ff3ba37d69 100644
--- a/module/productplan/model.php
+++ b/module/productplan/model.php
@@ -455,7 +455,7 @@ class productplanModel extends model
             ->remove('delta,uid,future')
             ->get();
 
-        if($oldPlan->parent != 0 and $oldPlan->parent != -1) $parentPlan = $this->getByID($oldPlan->parent);
+        if($oldPlan->parent > 0) $parentPlan = $this->getByID($oldPlan->parent);
         if(!empty($parentPlan->begin))
         { 
             if($plan->begin < $parentPlan->begin) dao::$errors['begin'] = sprintf($this->lang->productplan->beginLetterParent, $parentPlan->begin);
@@ -520,7 +520,7 @@ class productplanModel extends model
             $plan->end    = $data->end[$planID] == '' ? '2030-01-01' : $data->end[$planID];
             $plan->status = $data->status[$planID];
             
-            if($oldPlans[$planID]->parent != 0 and $oldPlans[$planID]->parent != -1) $parentPlan = $this->getByID($oldPlans[$planID]->parent);
+            if($oldPlans[$planID]->parent > 0) $parentPlan = $this->getByID($oldPlans[$planID]->parent);
             if(!empty($parentPlan->begin))
             {
                 if($plan->begin < $parentPlan->begin) dao::$errors['begin'] = sprintf($this->lang->productplan->beginLetterParent, $parentPlan->begin);