我有这个密码：

$con = $this->em->getConnection();
$query = sprintf(
   "ALTER TABLE client RENAME client_%s;
    ALTER TABLE client_deduplicate RENAME client;
    ALTER TABLE client DROP FOREIGN KEY rem_id;",
date('Ymd'),
date('Ymd')
);
$con->executeQuery($query);

当我试图执行 doctrine:schema:update --force 错误是：

An exception occurred while executing 'ALTER TABLE client ADD CONSTRAIN  
T FK_D99D49C4CDEADB2A FOREIGN KEY (rem_id) REFERENCES rem (id)':
SQLSTATE[23000]: Integrity constraint violation: 1022 Can't write;duplicate key 
in table '#sql-1_54'

请帮帮我。提前打电话。