diff --git a/module/convert/model.php b/module/convert/model.php
index c5b3238752..b4de934a2e 100644
--- a/module/convert/model.php
+++ b/module/convert/model.php
@@ -854,6 +854,7 @@ EOT;
         if(strpos($userKey, 'JIRAUSER') !== false)
         {
             $userID = str_replace('JIRAUSER', '', $userKey);
+            if(!isset($users[$userID])) return '';
             return $this->processJiraUser($users[$userID]->account, $users[$userID]->email);
         }
         else
@@ -999,7 +1000,7 @@ EOT;
             $relations    = $jiraRelation ? json_decode($jiraRelation, true) : array();
         }
 
-        if(!empty($relations["zentaoStatus{$issueType}"][$jiraStatus])) return $relations["zentaoStatus{$issueType}"][$jiraStatus];
+        if(!empty($relations["zentaoStatus{$issueType}"][$jiraStatus])) return (string)$relations["zentaoStatus{$issueType}"][$jiraStatus];
 
         if($objectType == 'testcase' && empty($this->config->testcase->needReview)) return 'normal';
         if($objectType == 'feedback' && empty($this->config->feedback->needReview)) return 'normal';
diff --git a/module/convert/tao.php b/module/convert/tao.php
index 6715aeb92d..64d45504fd 100644
--- a/module/convert/tao.php
+++ b/module/convert/tao.php
@@ -1039,7 +1039,7 @@ class convertTao extends convertModel
         $member->days    = 0;
         $member->hours   = $this->config->execution->defaultWorkhours;
 
-        $this->dao->dbh($this->dbh)->insert(TABLE_TEAM)->data($member)->exec();
+        $this->dao->dbh($this->dbh)->replace(TABLE_TEAM)->data($member)->exec();
 
         return true;
     }
@@ -1112,6 +1112,7 @@ class convertTao extends convertModel
             foreach($projectRoleActor[$data->id] as $userID)
             {
                 $account = $this->getJiraAccount($userID);
+                if(!$account) continue;
                 if($account == $project->openedBy) continue;
 
                 $this->createTeamMember($projectID, $account, 'project');
@@ -1167,6 +1168,7 @@ class convertTao extends convertModel
             foreach($projectRoleActor[$jiraProjectID] as $userID)
             {
                 $account = $this->getJiraAccount($userID);
+                if(!$account) continue;
                 if($account == $execution->openedBy) continue;
 
                 $this->createTeamMember($executionID, $account, 'execution');
@@ -1231,6 +1233,7 @@ class convertTao extends convertModel
                     foreach($projectRoleActor[$jiraProjectID] as $userID)
                     {
                         $account = $this->getJiraAccount($userID);
+                        if(!$account) continue;
                         if($account == $execution->openedBy) continue;
 
                         $this->createTeamMember($executionID, $account, 'execution');