diff --git a/gulliver/system/class.database_mysql.php b/gulliver/system/class.database_mysql.php
index fb6e56b93..c7334c2a7 100644
--- a/gulliver/system/class.database_mysql.php
+++ b/gulliver/system/class.database_mysql.php
@@ -89,8 +89,8 @@ class database extends database_base
                         $sKeys .= $this->sQuoteCharacter . $sColumnName . $this->sQuoteCharacter . ',';
                     }
 
-                    if (isset( $aParameters['Default'] ) && $aParameters['Default'] != '') {
-                        $sSQL .= " DEFAULT '" . $aParameters['Default'] . "'";
+                    if (isset( $aParameters['Default'] )) {
+                        $sSQL .= " DEFAULT '" . trim($aParameters['Default']) . "'";
                     }
 
                     $sSQL .= ',';
diff --git a/workflow/engine/config/schema.xml b/workflow/engine/config/schema.xml
index b37c7ba42..958dab82e 100644
--- a/workflow/engine/config/schema.xml
+++ b/workflow/engine/config/schema.xml
@@ -4250,7 +4250,7 @@
         </vendor>
         <column name="APP_UID" type="VARCHAR" size="32" required="true" primaryKey="true" default=""/>
         <column name="USR_UID" type="VARCHAR" size="32" required="true" primaryKey="true" default=""/>
-        <column name="DEL_INDEX" type="INTEGER" required="true" primaryKey="true" default=""/>
+        <column name="DEL_INDEX" type="INTEGER" required="true" primaryKey="true" default="0"/>
         <column name="TAS_UID" type="VARCHAR" size="32" required="true" default=""/>
         <column name="PRO_UID" type="VARCHAR" size="32" required="true" default=""/>
         <column name="APP_NUMBER" type="INTEGER" required="true" default="0"/>
diff --git a/workflow/engine/data/mysql/schema.sql b/workflow/engine/data/mysql/schema.sql
index 8b7fd5ff9..8b5f1430d 100644
--- a/workflow/engine/data/mysql/schema.sql
+++ b/workflow/engine/data/mysql/schema.sql
@@ -49,7 +49,7 @@ DROP TABLE IF EXISTS `APP_SEQUENCE`;
 
 CREATE TABLE `APP_SEQUENCE`
 (
-	`ID` INTEGER  NOT NULL,
+	`ID` INTEGER  NOT NULL AUTO_INCREMENT,
 	PRIMARY KEY (`ID`)
 )ENGINE=InnoDB ;
 #-----------------------------------------------------------------------------
@@ -672,9 +672,9 @@ CREATE TABLE `TASK`
 	`TAS_SELFSERVICE_EXECUTION` VARCHAR(15) default 'EVERY_TIME',
 	`TAS_NOT_EMAIL_FROM_FORMAT` INTEGER default 0,
 	`TAS_OFFLINE` VARCHAR(20) default 'FALSE' NOT NULL,
-	`TAS_EMAIL_SERVER_UID` VARCHAR(32) default '' NOT NULL,
+	`TAS_EMAIL_SERVER_UID` VARCHAR(32) default '',
 	`TAS_AUTO_ROOT` VARCHAR(20) default 'FALSE' NOT NULL,
-	`TAS_RECEIVE_SERVER_UID` VARCHAR(32) default '' NOT NULL,
+	`TAS_RECEIVE_SERVER_UID` VARCHAR(32) default '',
 	`TAS_RECEIVE_LAST_EMAIL` VARCHAR(20) default 'FALSE' NOT NULL,
 	`TAS_RECEIVE_EMAIL_FROM_FORMAT` INTEGER default 0,
 	`TAS_RECEIVE_MESSAGE_TYPE` VARCHAR(20) default 'text' NOT NULL,
@@ -2750,7 +2750,7 @@ CREATE TABLE `ABE_CONFIGURATION`
 	`ABE_SUBJECT_FIELD` VARCHAR(100) default '',
 	`ABE_MAILSERVER_OR_MAILCURRENT` INTEGER default 0,
 	`ABE_CUSTOM_GRID` MEDIUMTEXT,
-	`ABE_EMAIL_SERVER_UID` VARCHAR(32) default '' NOT NULL,
+	`ABE_EMAIL_SERVER_UID` VARCHAR(32) default '',
 	PRIMARY KEY (`ABE_UID`),
 	KEY `indexAbeProcess`(`PRO_UID`),
 	KEY `indexAbeProcessTask`(`PRO_UID`, `TAS_UID`)
@@ -3020,15 +3020,15 @@ CREATE TABLE `GMAIL_RELABELING`
 (
 	`LABELING_UID` VARCHAR(32)  NOT NULL,
 	`CREATE_DATE` DATETIME  NOT NULL,
-	`APP_UID` VARCHAR(32) NOT NULL DEFAULT '',
-	`DEL_INDEX` INT(11) NOT NULL DEFAULT '0',
-	`CURRENT_LAST_INDEX` INT(11) NOT NULL DEFAULT '0',
-	`UNASSIGNED` INT(11) NOT NULL DEFAULT '0',
-	`STATUS` VARCHAR(32) NOT NULL DEFAULT 'pending',
-	`MSG_ERROR` MEDIUMTEXT NULL,
+	`APP_UID` VARCHAR(32) default '' NOT NULL,
+	`DEL_INDEX` INTEGER default 0 NOT NULL,
+	`CURRENT_LAST_INDEX` INTEGER default 0 NOT NULL,
+	`UNASSIGNED` INTEGER default 0 NOT NULL,
+	`STATUS` VARCHAR(32) default 'pending' NOT NULL,
+	`MSG_ERROR` MEDIUMTEXT,
 	PRIMARY KEY (`LABELING_UID`),
 	KEY `indexStatus`(`STATUS`)
-)ENGINE=InnoDB  DEFAULT CHARSET='utf8' COMMENT='Task to synchronize Gmail Labels';
+)ENGINE=InnoDB  DEFAULT CHARSET='utf8' COMMENT='Task for label relabaling';
 #-----------------------------------------------------------------------------
 #-- NOTIFICATION_QUEUE
 #-----------------------------------------------------------------------------