Causa
scheduled_at solo se admite con state: published.
Qué hacer
Envíe state: published junto con scheduled_at, o retire scheduled_at.
application/problem+json
{
"type": "https://masnet.com/developers/errors/scheduled_requires_published",
"title": "Programar exige publicar",
"status": 422,
"detail": "...",
"code": "scheduled_requires_published",
"correlation_id": "..."
}