They are completely different technologies, there is no way to transfer licenses from one to the other and Steinberg has never had an iLok license server, hence have never issued iLok licenses, they have been using various forms of the elicenser technology since the 80’s.
Either there is a mistake, such as a eLicencer with a sticker ilok sticker on it or something, a misunderstanding of some sort or you actually have a really old craked version with a fake license sel file on the utility memory of the ilok stick.