PDO exception about integrity constraint about plugin-sitemigration HOT 4 CLOSED

WARN SiteMigration[2014-11-21 09:26:51] [dfcd5] Start transaction
WARN SiteMigration[2014-11-21 09:26:51] [dfcd5] Migrating site config
WARN SiteMigration[2014-11-21 09:26:51] [dfcd5] Loading existing actions
WARN SiteMigration[2014-11-21 09:26:52] [dfcd5] Migrating log data - visits
WARN SiteMigration[2014-11-21 09:27:42] [dfcd5] Migrating log data - link visit action
WARN SiteMigration[2014-11-21 09:33:16] [dfcd5] Migrating log data - conversions and conversion items

  [Zend_Db_Statement_Exception]
  SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'idaction_url' cannot be null

Exception trace:
 () at /var/.../libs/Zend/Db/Statement/Pdo.php:234
 Zend_Db_Statement_Pdo->_execute() at /var/.../libs/Zend/Db/Statement.php:300
 Zend_Db_Statement->execute() at /var/.../libs/Zend/Db/Adapter/Abstract.php:479
 Zend_Db_Adapter_Abstract->query() at /var/.../libs/Zend/Db/Adapter/Pdo/Abstract.php:238
 Zend_Db_Adapter_Pdo_Abstract->query() at /var/.../core/Db/Adapter/Pdo/Mysql.php:234
 Piwik\Db\Adapter\Pdo\Mysql->query() at /var/.../libs/Zend/Db/Adapter/Abstract.php:575
 Zend_Db_Adapter_Abstract->insert() at /var/.../plugins/SiteMigration/Helper/DBHelper.php:43
 Piwik\Plugins\SiteMigration\Helper\DBHelper->executeInsert() at /var/.../plugins/SiteMigration/Migrator/TableMigrator.php:56
 Piwik\Plugins\SiteMigration\Migrator\TableMigrator->processRow() at /var/.../plugins/SiteMigration/Migrator/TableMigrator.php:47
 Piwik\Plugins\SiteMigration\Migrator\TableMigrator->migrate() at /var/.../plugins/SiteMigration/Migrator/Migrator.php:204
 Piwik\Plugins\SiteMigration\Migrator\Migrator->migrateLogVisitConversions() at /var/.../plugins/SiteMigration/Migrator/Migrator.php:114
 Piwik\Plugins\SiteMigration\Migrator\Migrator->migrate() at /var/.../plugins/SiteMigration/Commands/MigrateSite.php:110
 Piwik\Plugins\SiteMigration\Commands\MigrateSite->execute() at /var/.../vendor/symfony/console/Symfony/Component/Console/Command/Command.php:252
 Symfony\Component\Console\Command\Command->run() at /var/.../vendor/symfony/console/Symfony/Component/Console/Application.php:889
 Symfony\Component\Console\Application->doRunCommand() at /var/.../vendor/symfony/console/Symfony/Component/Console/Application.php:193
 Symfony\Component\Console\Application->doRun() at n/a:n/a
 call_user_func() at /var/.../core/Console.php:60
 Piwik\Console->Piwik\{closure}() at /var/.../core/Access.php:454
 Piwik\Access::doAsSuperUser() at /var/.../core/Console.php:61
 Piwik\Console->doRun() at /var/.../vendor/symfony/console/Symfony/Component/Console/Application.php:124
 Symfony\Component\Console\Application->run() at /var/.../console:30