options multiple choice with other plus randomise on setting up survey;

insert question text; quick add subquestions (or add them one by one, it makes no difference).

Save question. Error message is

SQLSTATE[42602]: Invalid name: 7 ERROR: invalid name syntax

Error is on line 535

532 public function getLastInsertID($sequenceName='')
533 {
534 $this->setActive(true);
535 return $this->_pdo->lastInsertId($sequenceName);
536 }