However, while his command was clearly above that of a provincial governor, there is no proof that this was the case. Being Praetorian Prefect was not a necessary condition of being made the guardian of a Licinian Dynasty Caesar: it has never been seriously suggested that Ingenuus, who seems to have been similarly in loco parentis in respect of Saloninus's brother, the Caesar Valerian in the Danubian provinces, was so honoured.
Despite his command being above that of a provincial governor, there is no evidence to support this claim. Being Praetorian Prefect wasn't a requirement for becoming guardian of a Licinian Dynasty Caesar; Ingenuus, who acted as a caretaker for Saloninus's brother, the Caesar Valerian in the Danubian provinces, was not considered for such an honor.