Board Thread:Support Requests - Getting Technical/@comment-2177054-20190411173756/@comment-9605025-20190411215933

It may be worth noting that the documentation you linked to says it was introduced in v1.23. If I recall correctly, Wikia forked at v1.19. As such, I would not count on having features that were introduced after v1.19. What kind of values are you trying to prefill anyways? If they are set values, I think there are at least 2 alternatives you could try.