A quick follow along, the version key seems to be much more temperamental on iOS versions 18.7 and below (from my limited testing) iOS 26 does seem to respect it, though it does seem to be slow with the updates themselves (possibly 1 hour between the new config being sent down and the update, but that may be down to wifi/battery saver mode)

Hello and thanks for the reply, The 404 is returned when the device reaches out to fetch the associated app configuration, but during the config creation it is discovered that no licenses are available. I take it from the documentation it is implied that the failure of applying the configuration does not block other activations, rather than failure to fetch a configuration then? I'll take that advice onboard thank you agin for answering