diff --git a/db/update17.4.sql b/db/update17.4.sql
index 9b2e71b002..f8ea4c6321 100644
--- a/db/update17.4.sql
+++ b/db/update17.4.sql
@@ -200,3 +200,5 @@ ALTER TABLE `zt_sqlview` ENGINE='InnoDB';
 ALTER TABLE `zt_searchindex` ADD FULLTEXT `title_content` (`title`, `content`);
 ALTER TABLE `zt_searchindex` DROP INDEX `title`;
 ALTER TABLE `zt_searchindex` DROP INDEX `content`;
+
+UPDATE `zt_project` SET `closedDate`='' AND `closedBy`='' WHERE `status` != 'closed';
diff --git a/module/execution/model.php b/module/execution/model.php
index 0f62b516f5..e4678576d4 100644
--- a/module/execution/model.php
+++ b/module/execution/model.php
@@ -949,6 +949,8 @@ class executionModel extends model
             ->setDefault('status', 'doing')
             ->setDefault('lastEditedBy', $this->app->user->account)
             ->setDefault('lastEditedDate', $now)
+            ->setDefault('closedBy', '')
+            ->setDefault('closedDate', '')
             ->stripTags($this->config->execution->editor->activate['id'], $this->config->allowedTags)
             ->remove('comment,readjustTime,readjustTask')
             ->get();