diff --git a/inc/process.class.php b/inc/process.class.php
index 5ddb3a2..eec9960 100644
--- a/inc/process.class.php
+++ b/inc/process.class.php
@@ -60,13 +60,14 @@ class PluginProcessmakerProcess extends CommonDBTM {
             $translates = true;
             // create a reversed map for languages
             foreach ($CFG_GLPI['languages'] as $key => $valArray) {
-               $mapLangs[ locale_get_primary_language( $key ) ][] = $key;
+               $lg = locale_get_primary_language( $key );
+               $mapLangs[$lg][] = $key;
             }
          //}
          $lang = locale_get_primary_language( $CFG_GLPI['language'] );
          $query = "SELECT TASK.TAS_UID, TASK.TAS_START, CONTENT.CON_LANG, CONTENT.CON_CATEGORY, CONTENT.CON_VALUE FROM TASK
                         INNER JOIN CONTENT ON CONTENT.CON_ID=TASK.TAS_UID
-                        WHERE TASK.TAS_TYPE = 'NORMAL' AND TASK.PRO_UID = '".$this->fields['process_guid']."' AND CONTENT.CON_CATEGORY IN ('TAS_TITLE', 'TAS_DESCRIPTION') ".($translates ? "" : " AND CONTENT.CON_LANG='$lang'")." ;";
+                        WHERE (TASK.TAS_TYPE = 'NORMAL' OR TASK.TAS_TYPE = 'SUBPROCESS') AND TASK.PRO_UID = '".$this->fields['process_guid']."' AND CONTENT.CON_CATEGORY IN ('TAS_TITLE', 'TAS_DESCRIPTION') ".($translates ? "" : " AND CONTENT.CON_LANG='$lang'")." ;";
          $taskArray = [];
          $defaultLangTaskArray = [];
          foreach ($PM_DB->request( $query ) as $task) {
diff --git a/install/mysql/3.2.8-empty.sql b/install/mysql/3.2.8-empty.sql
index b30b1aa..6a217a1 100644
--- a/install/mysql/3.2.8-empty.sql
+++ b/install/mysql/3.2.8-empty.sql
@@ -34,7 +34,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_caselinks` (
   KEY `is_active` (`is_active`),
   KEY `is_externaldata` (`is_externaldata`),
   KEY `is_self` (`is_self`)
-) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_cases
@@ -71,7 +71,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_configs` (
   `domain` varchar(50) DEFAULT '',
   `maintenance` tinyint(1) NOT NULL DEFAULT '0',
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_crontaskactions
@@ -87,7 +87,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_crontaskactions` (
   `state` int(11) NOT NULL,
   `date_mod` timestamp NULL DEFAULT NULL,
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB AUTO_INCREMENT=164 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_processes
@@ -106,7 +106,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_processes` (
   `project_type` varchar(50) NOT NULL DEFAULT 'classic',
   PRIMARY KEY (`id`),
   UNIQUE KEY `process_guid` (`process_guid`)
-) ENGINE=InnoDB AUTO_INCREMENT=41 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_processes_profiles
@@ -121,7 +121,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_processes_profiles` (
   KEY `profiles_id` (`profiles_id`),
   KEY `processes_id` (`processes_id`),
   KEY `is_recursive` (`is_recursive`)
-) ENGINE=InnoDB AUTO_INCREMENT=22 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_taskcategories
@@ -136,7 +136,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_taskcategories` (
   UNIQUE KEY `pm_task_guid` (`pm_task_guid`),
   UNIQUE KEY `items` (`taskcategories_id`),
   KEY `processes_id` (`processes_id`)
-) ENGINE=InnoDB AUTO_INCREMENT=62 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_tasks
@@ -149,7 +149,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_tasks` (
   PRIMARY KEY (`id`),
   UNIQUE KEY `case_id` (`case_id`,`del_index`),
   UNIQUE KEY `items` (`itemtype`,`items_id`)
-) ENGINE=InnoDB AUTO_INCREMENT=473 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_users
@@ -159,7 +159,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_users` (
   `password` varchar(32) DEFAULT NULL,
   PRIMARY KEY (`id`),
   UNIQUE KEY `pm_users_id` (`pm_users_id`)
-) ENGINE=InnoDB AUTO_INCREMENT=12918 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 /*!40101 SET SQL_MODE=IFNULL(@OLD_SQL_MODE, '') */;
diff --git a/install/mysql/3.2.9-empty.sql b/install/mysql/3.2.9-empty.sql
index 747e6e0..3ee30cd 100644
--- a/install/mysql/3.2.9-empty.sql
+++ b/install/mysql/3.2.9-empty.sql
@@ -34,7 +34,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_caselinks` (
   KEY `is_active` (`is_active`),
   KEY `is_externaldata` (`is_externaldata`),
   KEY `is_self` (`is_self`)
-) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_cases
@@ -72,7 +72,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_configs` (
   `maintenance` tinyint(1) NOT NULL DEFAULT '0',
   `db_version` varchar(10) NOT NULL DEFAULT '3.2.9',
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_crontaskactions
@@ -88,7 +88,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_crontaskactions` (
   `state` int(11) NOT NULL,
   `date_mod` timestamp NULL DEFAULT NULL,
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB AUTO_INCREMENT=164 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_processes
@@ -107,7 +107,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_processes` (
   `project_type` varchar(50) NOT NULL DEFAULT 'classic',
   PRIMARY KEY (`id`),
   UNIQUE KEY `process_guid` (`process_guid`)
-) ENGINE=InnoDB AUTO_INCREMENT=41 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_processes_profiles
@@ -122,7 +122,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_processes_profiles` (
   KEY `profiles_id` (`profiles_id`),
   KEY `processes_id` (`processes_id`),
   KEY `is_recursive` (`is_recursive`)
-) ENGINE=InnoDB AUTO_INCREMENT=22 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_taskcategories
@@ -137,7 +137,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_taskcategories` (
   UNIQUE KEY `pm_task_guid` (`pm_task_guid`),
   UNIQUE KEY `items` (`taskcategories_id`),
   KEY `processes_id` (`processes_id`)
-) ENGINE=InnoDB AUTO_INCREMENT=62 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_tasks
@@ -150,7 +150,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_tasks` (
   PRIMARY KEY (`id`),
   UNIQUE KEY `case_id` (`case_id`,`del_index`),
   UNIQUE KEY `items` (`itemtype`,`items_id`)
-) ENGINE=InnoDB AUTO_INCREMENT=473 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_users
@@ -160,7 +160,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_users` (
   `password` varchar(32) DEFAULT NULL,
   PRIMARY KEY (`id`),
   UNIQUE KEY `pm_users_id` (`pm_users_id`)
-) ENGINE=InnoDB AUTO_INCREMENT=12918 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 /*!40101 SET SQL_MODE=IFNULL(@OLD_SQL_MODE, '') */;
diff --git a/install/mysql/3.3.0-empty.sql b/install/mysql/3.3.0-empty.sql
index b2ebbfd..0c150b8 100644
--- a/install/mysql/3.3.0-empty.sql
+++ b/install/mysql/3.3.0-empty.sql
@@ -34,7 +34,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_caselinks` (
   KEY `is_active` (`is_active`),
   KEY `is_externaldata` (`is_externaldata`),
   KEY `is_self` (`is_self`)
-) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_cases
@@ -46,6 +46,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_cases` (
 	`case_num` INT(11) NOT NULL,
 	`case_status` VARCHAR(20) NOT NULL DEFAULT 'DRAFT',
 	`plugin_processmaker_processes_id` INT(11) NULL DEFAULT NULL,
+   `is_subprocess` TINYINT(1) NOT NULL DEFAULT '0',
 	INDEX `items` (`itemtype`, `items_id`),
 	INDEX `case_status` (`case_status`),
 	PRIMARY KEY (`id`),
@@ -77,7 +78,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_configs` (
   `maintenance` tinyint(1) NOT NULL DEFAULT '0',
   `db_version` varchar(10) NOT NULL DEFAULT '3.3.0',
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_crontaskactions
@@ -93,7 +94,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_crontaskactions` (
   `state` int(11) NOT NULL,
   `date_mod` timestamp NULL DEFAULT NULL,
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB AUTO_INCREMENT=164 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB  DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_processes
@@ -112,7 +113,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_processes` (
   `project_type` varchar(50) NOT NULL DEFAULT 'classic',
   PRIMARY KEY (`id`),
   UNIQUE KEY `process_guid` (`process_guid`)
-) ENGINE=InnoDB AUTO_INCREMENT=41 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_processes_profiles
@@ -127,22 +128,23 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_profiles` (
   KEY `profiles_id` (`profiles_id`),
   KEY `processes_id` (`processes_id`),
   KEY `is_recursive` (`is_recursive`)
-) ENGINE=InnoDB AUTO_INCREMENT=22 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8 ;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_taskcategories
-CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_taskcategories` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
-  `processes_id` int(11) NOT NULL,
-  `pm_task_guid` varchar(32) NOT NULL,
-  `taskcategories_id` int(11) NOT NULL,
-  `start` bit(1) NOT NULL DEFAULT b'0',
-  `is_active` tinyint(1) NOT NULL DEFAULT '1',
-  PRIMARY KEY (`id`),
-  UNIQUE KEY `pm_task_guid` (`pm_task_guid`),
-  UNIQUE KEY `items` (`taskcategories_id`),
-  KEY `processes_id` (`processes_id`)
-) ENGINE=InnoDB AUTO_INCREMENT=62 DEFAULT CHARSET=utf8;
+CREATE TABLE `glpi_plugin_processmaker_taskcategories` (
+	`id` INT(11) NOT NULL AUTO_INCREMENT,
+	`plugin_processmaker_processes_id` INT(11) NOT NULL,
+	`pm_task_guid` VARCHAR(32) NOT NULL,
+	`taskcategories_id` INT(11) NOT NULL,
+	`is_start` TINYINT(1) NOT NULL DEFAULT '0',
+	`is_active` TINYINT(1) NOT NULL DEFAULT '1',
+	`is_subprocess` TINYINT(1) NOT NULL DEFAULT '0',
+	PRIMARY KEY (`id`),
+	UNIQUE INDEX `pm_task_guid` (`pm_task_guid`),
+	UNIQUE INDEX `items` (`taskcategories_id`),
+	INDEX `plugin_processmaker_processes_id` (`plugin_processmaker_processes_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_tasks
@@ -152,10 +154,11 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_tasks` (
   `itemtype` varchar(32) NOT NULL,
   `case_id` varchar(32) NOT NULL,
   `del_index` int(11) NOT NULL,
+  `thread_index` INT(11) NOT NULL,
   PRIMARY KEY (`id`),
   UNIQUE KEY `case_id` (`case_id`,`del_index`),
   UNIQUE KEY `items` (`itemtype`,`items_id`)
-) ENGINE=InnoDB AUTO_INCREMENT=473 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 -- Dumping structure for table glpi.glpi_plugin_processmaker_users
@@ -165,7 +168,7 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_processmaker_users` (
   `password` varchar(32) DEFAULT NULL,
   PRIMARY KEY (`id`),
   UNIQUE KEY `pm_users_id` (`pm_users_id`)
-) ENGINE=InnoDB AUTO_INCREMENT=12918 DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 
 /*!40101 SET SQL_MODE=IFNULL(@OLD_SQL_MODE, '') */;
diff --git a/install/update.php b/install/update.php
index 5a2573b..8361bc1 100644
--- a/install/update.php
+++ b/install/update.php
@@ -17,23 +17,22 @@ function processmaker_update(){
       case '2.4.1' :
          // will upgrade any old versions (< 3.2.8) to 3.2.8
          include_once(GLPI_ROOT."/plugins/processmaker/install/update_to_3_2_8.php");
-         update_to_3_2_8();
+         $new_version = update_to_3_2_8();
 
       case '3.2.8' :
          // will upgrade 3.2.8 to 3.2.9
          include_once(GLPI_ROOT."/plugins/processmaker/install/update_3_2_8_to_3_2_9.php");
-         update_3_2_8_to_3_2_9();
+         $new_version = update_3_2_8_to_3_2_9();
 
-      case '3.3.0' :
+      case '3.2.9' :
          // will upgrade 3.2.9 to 3.3.0
          include_once(GLPI_ROOT."/plugins/processmaker/install/update_3_2_9_to_3_3_0.php");
-         update_3_2_9_to_3_3_0();
-
+         $new_version = update_3_2_9_to_3_3_0();
    }
 
    // end update by updating the db version number
-   $query = "UPDATE `glpi_plugin_processmaker_configs` SET `db_version` = '$current_version' WHERE `id` = 1;";
+   $query = "UPDATE `glpi_plugin_processmaker_configs` SET `db_version` = '$new_version' WHERE `id` = 1;";
 
    $DB->query($query) or die("error when updating db_version field in glpi_plugin_processmaker_configs" . $DB->error());
-   
+
 }
diff --git a/install/update_3_2_8_to_3_2_9.php b/install/update_3_2_8_to_3_2_9.php
index 4faa046..b70ba31 100644
--- a/install/update_3_2_8_to_3_2_9.php
+++ b/install/update_3_2_8_to_3_2_9.php
@@ -3,8 +3,12 @@
 function update_3_2_8_to_3_2_9(){
    global $DB;
 
-   $query = "ALTER TABLE `glpi_plugin_processmaker_configs`
-               ADD COLUMN `db_version` VARCHAR(10) NULL;";
-   $DB->query($query) or die("error adding db_version field to glpi_plugin_processmaker_configs" . $DB->error());
+   if (!arFieldExists("glpi_plugin_processmaker_configs", "db_version")) {
+      $query = "ALTER TABLE `glpi_plugin_processmaker_configs`
+                  ADD COLUMN `db_version` VARCHAR(10) NULL;";
+      $DB->query($query) or die("error adding db_version field to glpi_plugin_processmaker_configs" . $DB->error());
+   }
+
+   return '3.2.9';
 
 }
diff --git a/install/update_3_2_9_to_3_3_0.php b/install/update_3_2_9_to_3_3_0.php
index f98fc77..dc8e5b2 100644
--- a/install/update_3_2_9_to_3_3_0.php
+++ b/install/update_3_2_9_to_3_3_0.php
@@ -7,12 +7,18 @@ function update_3_2_9_to_3_3_0(){
    // Alter table plugin_processmaker_cases
    if (!arFieldExists("glpi_plugin_processmaker_cases", "plugin_processmaker_processes_id" )) {
       $query = "ALTER TABLE `glpi_plugin_processmaker_cases`
-	               ALTER `id` DROP DEFAULT;
-               ALTER TABLE `glpi_plugin_processmaker_cases`
+               	ALTER `id` DROP DEFAULT;";
+      $DB->query($query) or die("error normalizing glpi_plugin_processmaker_cases table step 1" . $DB->error());
+
+      $query = "ALTER TABLE `glpi_plugin_processmaker_cases`
+	              CHANGE COLUMN `id` `case_guid` VARCHAR(32) NOT NULL AFTER `items_id`;";
+      $DB->query($query) or die("error normalizing glpi_plugin_processmaker_cases table step 2" . $DB->error());
+
+      $query = "ALTER TABLE `glpi_plugin_processmaker_cases`
 	               ADD COLUMN `id` INT(11) NOT NULL AUTO_INCREMENT FIRST,
 	               CHANGE COLUMN `itemtype` `itemtype` VARCHAR(10) NOT NULL DEFAULT 'Ticket' AFTER `id`,
-	               CHANGE COLUMN `id` `case_guid` VARCHAR(32) NOT NULL AFTER `items_id`,
 	               CHANGE COLUMN `processes_id` `plugin_processmaker_processes_id` INT(11) NULL DEFAULT NULL AFTER `case_status`,
+                  ADD COLUMN `is_subprocess` TINYINT(1) NOT NULL DEFAULT '0' AFTER `plugin_processmaker_processes_id`,
 	               DROP INDEX `items`,
 	               ADD INDEX `items` (`itemtype`, `items_id`),
 	               ADD PRIMARY KEY (`id`),
@@ -20,25 +26,31 @@ function update_3_2_9_to_3_3_0(){
 	               ADD UNIQUE INDEX `case_num` (`case_num`),
 	               ADD INDEX `plugin_processmaker_processes_id` (`plugin_processmaker_processes_id`);";
 
-      $DB->query($query) or die("error normalizing glpi_plugin_processmaker_cases table" . $DB->error());
+      $DB->query($query) or die("error normalizing glpi_plugin_processmaker_cases table step 3" . $DB->error());
    }
 
    if (!arTableExists("glpi_plugin_processmaker_profiles")) {
-      $query = "ALTER TABLE `glpi_plugin_processmaker_processes_profiles`
-	               CHANGE COLUMN `processes_id` `plugin_processmaker_processes_id` INT(11) NOT NULL DEFAULT '0' AFTER `id`;
-                RENAME TABLE `glpi_plugin_processmaker_processes_profiles` TO `glpi_plugin_processmaker_profiles`;";
-      $DB->query($query) or die("error normalizing glpi_plugin_processmaker_processes_profiles table" . $DB->error());
-   }   
+      $query = "RENAME TABLE `glpi_plugin_processmaker_processes_profiles` TO `glpi_plugin_processmaker_profiles`;";
+      $DB->query($query) or die("error renaming glpi_plugin_processmaker_processes_profiles to glpi_plugin_processmaker_profiles" . $DB->error());
+   }
+
+   if (!arFieldExists("glpi_plugin_processmaker_profiles", "plugin_processmaker_processes_id")) {
+      $query = "ALTER TABLE `glpi_plugin_processmaker_profiles`
+	               CHANGE COLUMN `processes_id` `plugin_processmaker_processes_id` INT(11) NOT NULL DEFAULT '0' AFTER `id`;";
+      $DB->query($query) or die("error renaming processes_id into plugin_processmaker_processes_id" . $DB->error());
+   }
 
    if (!arFieldExists("glpi_plugin_processmaker_tasks", "plugin_processmaker_cases_id" )) {
       $query = "ALTER TABLE `glpi_plugin_processmaker_tasks`
-	               ALTER `itemtype` DROP DEFAULT;
-               ALTER TABLE `glpi_plugin_processmaker_tasks`
+	               ALTER `itemtype` DROP DEFAULT;";
+      $DB->query($query) or die("error normalizing glpi_plugin_processmaker_tasks table step 1" . $DB->error());
+      $query = "ALTER TABLE `glpi_plugin_processmaker_tasks`
 	               CHANGE COLUMN `itemtype` `itemtype` VARCHAR(32) NOT NULL AFTER `id`,
 	               ADD COLUMN `plugin_processmaker_cases_id` INT(11) NULL AFTER `case_id`,
+	               ADD COLUMN `thread_index` INT(11) NOT NULL AFTER `del_index`,
 	               DROP INDEX `case_id`,
 	               ADD INDEX `plugin_processmaker_cases_id` (`plugin_processmaker_cases_id`, `del_index`);";
-      $DB->query($query) or die("error normalizing glpi_plugin_processmaker_tasks table" . $DB->error());
+      $DB->query($query) or die("error normalizing glpi_plugin_processmaker_tasks table step 2" . $DB->error());
 
       // transform case_id (=GUID) into plugin_processmaker_cases_id
       $query = "UPDATE `glpi_plugin_processmaker_tasks`
@@ -51,4 +63,19 @@ function update_3_2_9_to_3_3_0(){
       $DB->query($query) or die("error deleting case_id column in glpi_plugin_processmaker_tasks table" . $DB->error());
    }
 
+   if (!arFieldExists("glpi_plugin_processmaker_taskcategories", "is_subprocess" )) {
+      $query = "ALTER TABLE `glpi_plugin_processmaker_taskcategories`
+	               ALTER `processes_id` DROP DEFAULT;";
+      $DB->query($query) or die("error normalizing glpi_plugin_processmaker_taskcategories step 1" . $DB->error());
+
+      $query = "ALTER TABLE `glpi_plugin_processmaker_taskcategories`
+                  CHANGE COLUMN `processes_id` `plugin_processmaker_processes_id` INT(11) NOT NULL AFTER `id`,
+                  CHANGE COLUMN `start` `is_start` TINYINT(1) NOT NULL DEFAULT '0' AFTER `taskcategories_id`,
+	               ADD COLUMN `is_subprocess` TINYINT(1) NOT NULL DEFAULT '0' AFTER `is_active`,
+	               DROP INDEX `processes_id`,
+	               ADD INDEX `plugin_processmaker_processes_id` (`plugin_processmaker_processes_id`);";
+      $DB->query($query) or die("error normalizing glpi_plugin_processmaker_taskcategories step 2" . $DB->error());
+   }
+
+   return '3.3.0';
 }
diff --git a/install/update_to_3_2_8.php b/install/update_to_3_2_8.php
index 7f8fb74..db031fe 100644
--- a/install/update_to_3_2_8.php
+++ b/install/update_to_3_2_8.php
@@ -192,5 +192,5 @@ function update_to_3_2_8(){
    //   $DB->query($query) or die("error creating glpi_plugin_processmaker_selfservicedrafts" . $DB->error());
    //}
 
-
+   return '3.2.8';
 }
\ No newline at end of file