I have created a form in our DEV environment and set up a form to add items to a list and has a fixed parent item.
When I imported the model to our TEST environment and repointed the NUX dashboard to the new model, the form parent (either manually selecting or fixed parent) is greyed out and I can't work out why. I have also created new forms in both workspaces to test this issue.
Thanks for your reply. I realised this morning that both lists needs to be set to production. In my case my child list was set to production but the parent was not. It was a guess and it appeared to resolve the issue when I synced my revision to the test model.
Agree that changing the source model of a page does weird things to actions and forms, it seems they have to be created per model and they double up but also lose their settings.