diff --git a/install/mysql/plugin_formcreator_empty.sql b/install/mysql/plugin_formcreator_empty.sql
index 96cd02899..d323e0c19 100644
--- a/install/mysql/plugin_formcreator_empty.sql
+++ b/install/mysql/plugin_formcreator_empty.sql
@@ -75,7 +75,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_formcreator_formanswers` (
   `requester_id`                int(11) DEFAULT NULL,
   `users_id_validator`          int(11) NOT NULL DEFAULT '0',
   `groups_id_validator`         int(11) NOT NULL DEFAULT '0',
-  `request_date`                timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  `request_date`                timestamp NULL,
   `status`                      int(11) NOT NULL DEFAULT '101',
   `validation_percent`          int(11) NOT NULL DEFAULT '0',
   `comment`                     text,
@@ -259,8 +259,8 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_formcreator_issues` (
   `original_id`           int(11)       NOT NULL DEFAULT '0',
   `sub_itemtype`          varchar(100)  NOT NULL DEFAULT '',
   `status`                varchar(255)  NOT NULL DEFAULT '',
-  `date_creation`         timestamp     NOT NULL DEFAULT CURRENT_TIMESTAMP,
-  `date_mod`              timestamp     NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  `date_creation`         timestamp     NULL,
+  `date_mod`              timestamp     NULL,
   `entities_id`           int(11)       NOT NULL DEFAULT '0',
   `is_recursive`          tinyint(1)    NOT NULL DEFAULT '0',
   `requester_id`          int(11)       NOT NULL DEFAULT '0',
diff --git a/install/upgrade_to_2.12.php b/install/upgrade_to_2.12.php
index 49de7e14c..9af4b0b4f 100644
--- a/install/upgrade_to_2.12.php
+++ b/install/upgrade_to_2.12.php
@@ -42,11 +42,11 @@ public function upgrade(Migration $migration) {
 
       // Convert datetime to timestamp
       $table = 'glpi_plugin_formcreator_formanswers';
-      $migration->changeField($table, 'request_date', 'request_date', 'timestamp'. ' NOT NULL DEFAULT CURRENT_TIMESTAMP');
+      $migration->changeField($table, 'request_date', 'request_date', 'timestamp');
 
       $table = 'glpi_plugin_formcreator_issues';
-      $migration->changeField($table, 'date_creation', 'date_creation', 'timestamp'. ' NOT NULL DEFAULT CURRENT_TIMESTAMP');
-      $migration->changeField($table, 'date_mod', 'date_mod', 'timestamp'. ' NOT NULL DEFAULT CURRENT_TIMESTAMP');
+      $migration->changeField($table, 'date_creation', 'date_creation', 'timestamp');
+      $migration->changeField($table, 'date_mod', 'date_mod', 'timestamp');
       $this->addValidationPercent();
 
       $this->changeDropdownTreeSettings();