Hi All,
the Q2 2025 release notes mention the new event subscriptions version. This article describes the differences between the legacy and new version.
And the list of the Workfront Fusion modules describes (not vey detailed) how you can switch between the versions:

This suggests that you can change/set/manage the subscription version for each of your scenarios separately.
I did some testing today and my findings don't confirm this.
I found that:
- The module "Update Events Payload Version" needs to be run only once, to set the desired version. (As opposed to being included in the scenario each time when it's running.)
- More importantly, when the module runs, it sets the desired version for ALL your scenarios, not just for 1 specific scenario. (I confirmed this by checking my subsriptions' data using a custom HTTP call to the subscriptions endpoint.)
So it seems irrelevant which of your scenarios includes the module. You could create a new scenario just to hold the "Update Events Payload Version" module and it's enough to run that once. Remember that it impacts all your scenarios:


I hope this will be useful for some of you and I wonder if any of you have a different experience.
Tibor