PdoSessionHandler current transaction is aborted

Sometimes i have problem: PDOException: Exception 'PDOException' with message 'SQLSTATE[25P02]: In failed sql transaction: 7 ERROR: current transaction is aborted, commands ignored until end of transaction block' in /../vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php:546

I am using PostgreSql.