TYPO3 Flow: Extending Person for my own account

Account.php

<?php
namespace Teamwork\Teamwork\Domain\Model;

/*                                                                        *
 * This script belongs to the TYPO3 Flow package "Teamwork.Teamwork".     *
 *                                                                        *
 *                                                                        */

use TYPO3\Flow\Annotations as Flow;
use Doctrine\ORM\Mapping as ORM;

/**
 * A Account
 *
 * @Flow\Entity
 */
class Account extends \TYPO3\Party\Domain\Model\Person {

  /**
   * Teams
	 *
	 * @var \Doctrine\Common\Collections\ArrayCollection<\Teamwork\Teamwork\Domain\Model\Team>
	 * @ORM\ManyToMany(inversedBy="members", cascade={"all"})
	 */
	protected $teams;

}
?>

gistfile1.txt

  An exception occurred while executing 'ALTER TABLE
  teamwork_teamwork_domain_model_account ADD CONSTRAINT FK_8F3E8CCC47A46B0A
  FOREIGN KEY (persistence_object_identifier) REFERENCES
  typo3_party_domain_model_abstractparty (persistence_object_identifier) ON
  DELETE CASCADE':
  
  SQLSTATE[HY000]: General error: 1005 Can't create table
  'teamwork.#sql-2f5_ee6' (errno: 150)

Version20121230185531.php

<?php
namespace TYPO3\Flow\Persistence\Doctrine\Migrations;

use Doctrine\DBAL\Migrations\AbstractMigration,
  Doctrine\DBAL\Schema\Schema;

/**
 * Auto-generated Migration: Please modify to your need!
 */
class Version20121230185531 extends AbstractMigration {

	/**
	 * @param Schema $schema
	 * @return void
	 */
	public function up(Schema $schema) {
			// this up() migration is autogenerated, please modify it to your needs
		$this->abortIf($this->connection->getDatabasePlatform()->getName() != "mysql");
		
		$this->addSql("ALTER TABLE teamwork_teamwork_domain_model_account ADD CONSTRAINT FK_8F3E8CCC47A46B0A FOREIGN KEY (persistence_object_identifier) REFERENCES typo3_party_domain_model_abstractparty (persistence_object_identifier) ON DELETE CASCADE");
		$this->addSql("ALTER TABLE teamwork_teamwork_domain_model_account_teams_join ADD CONSTRAINT FK_9A050FB71D70B335 FOREIGN KEY (teamwork_account) REFERENCES teamwork_teamwork_domain_model_account (persistence_object_identifier)");
		$this->addSql("ALTER TABLE teamwork_teamwork_domain_model_account_teams_join ADD CONSTRAINT FK_9A050FB7ABA18E39 FOREIGN KEY (teamwork_team) REFERENCES teamwork_teamwork_domain_model_team (persistence_object_identifier)");
	}

	/**
	 * @param Schema $schema
	 * @return void
	 */
	public function down(Schema $schema) {
			// this down() migration is autogenerated, please modify it to your needs
		$this->abortIf($this->connection->getDatabasePlatform()->getName() != "mysql");
		
		$this->addSql("ALTER TABLE teamwork_teamwork_domain_model_account DROP FOREIGN KEY FK_8F3E8CCC47A46B0A");
		$this->addSql("ALTER TABLE teamwork_teamwork_domain_model_account_teams_join DROP FOREIGN KEY FK_9A050FB71D70B335");
		$this->addSql("ALTER TABLE teamwork_teamwork_domain_model_account_teams_join DROP FOREIGN KEY FK_9A050FB7ABA18E39");
	}
}

?>