set back
Does "set back" here mean "to delay"?
O’Neill firmly believed he had won the case because he had avoided jail time, but the
unfortunate truth of the matter, as the legal scholar Edward Samuels concluded based on the legal precedents that were established in the case, is otherwise. Samuels said, ‘‘They set parody back twenty years.’’
Does it mean "they delayed parody for twenty years"?